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#1 2011-07-20 23:56:31

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Factoring Polynomials

hey i was wondering if any body can help and see if i did theses correct for #1 i got a for #2- i got a for #3 i got f for number #4 i got d

thanx

1. 4x^3  12x^2 + 4x

A4x(x^2  3x + 1)
B4x(4x^2  3x + 1)
C4x(4x^2  3x - 1)
D4x(x^2  6x + 1)
E2x(2x^2  6x + 2)
FThis polynomial cannot be factored using the GCF method.

2. 9x^4 + 4x^3  27x^2 + 12x

Ax(9x^3 + 4x^2 + 27x - 12)
Bx(9x^3 + 4x^2  27x + 12)
Cx(9x^4 + 4x^3  27x^2 + 12x)
Dx(9x^2 + 4x  27x + 12)
E3x(3x^3 + x^2  9x + 4)
FThis polynomial cannot be factored using the GCF method.

3. x^2  3x + 4

Ax(x  3)
Bx(x + 3)
Cx(x  1)
Dx(x  7)
Ex(x + 7)
FThis polynomial cannot be factored using the GCF method.

4. 17x^5 + 51x^2  34

A17x^5 + 3x^2 + 2
B17(x^3 + 3x^2 + 2)
C17(x^4 + 3x^2 + 2)
D17(x^5 + 3x^2  2)
Ex^5 + 3x^2  2
FThis polynomial cannot be factored using the GCF method.

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#2 2011-07-21 00:09:50

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

Re: Factoring Polynomials

hi zee-f

1 is correct!2 is incorrect(hint:look at the signs).3 and 4 are also correct.

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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#3 2011-07-21 00:48:44

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

for 2 i missed the signs lol thats a tricky one for #2 its B

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#4 2011-07-21 00:50:45

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

does anybody know a good website that teaches you Factoring Polynomials using grouping

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#5 2011-07-21 00:56:10

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Factoring Polynomials

Hi zee-f;

I can not think of a better one than here. You can learn by doing. Post them and show your work. Someone will help.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#6 2011-07-21 02:02:39

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

how can i factor by grouping if theirs  only three terms

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#7 2011-07-21 02:07:00

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Factoring Polynomials

What does the problem look like?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#8 2011-07-21 02:26:08

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

x^2  2x + 1

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#9 2011-07-21 02:30:49

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Factoring Polynomials

That one is not done by grouping which is usually for degree 3 or more polynomials.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#10 2011-07-21 02:35:23

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

A(x  1)(x  1)
B(x  1)(x + 1)
C(x + 1)(x  1)
D(x + 1)(x + 1)
E(x + 2)(x  1)
FThis polynomial cannot be factored by grouping.

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#11 2011-07-21 02:37:29

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Factoring Polynomials

Hi;

A is correct, what did you get?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#12 2011-07-21 02:40:08

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

so why is it a like a want an explanation on how to do these polynomials  in grouping

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#13 2011-07-21 02:40:52

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Factoring Polynomials

I use factoring to do those, have you been taught that?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#14 2011-07-21 02:46:26

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

i was taught by finding the GCF now i have to do them by grouping am confused on the grouping method

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#15 2011-07-21 02:50:28

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Factoring Polynomials

Hi;

The GCF is used on bigger ones ( 4 terms ). Do you remember how to do one by grouping as you call it?

See you a little later, have to rest for a while.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#16 2011-07-21 03:10:00

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

see its not letting me choose witch method the question says Factor problems 5 - 8 by grouping.

6. x^2 + 2x  15

A(x - 5)(x  3)
B(x + 5)(x + 3)
C(x + 5)(x  3)
D(x - 5)(x + 3)
E(x + 15)(x  1)
FThis polynomial cannot be factored by grouping.

a want to know how i can do the method

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#17 2011-07-21 03:29:04

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

Re: Factoring Polynomials

hi zee-f

you can do it like this:
x^2 + 2x - 15=
x^2 - 5x + 3x - 15=
x(x-5) + 3(x-5)=
(x+3)(x-5)

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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#18 2011-07-21 08:54:30

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

hey guys so i did number 7 the same way i hope i did it correct
so number 7 is x^2-3x-18

x^2-3x-18=
x^2-6x-3x-18

x(x-6)-3(x-6)

(x-3)(x-6)

7. x^2  3x  18

A(x + 3)(x + 6)
B(x + 3)(x - 6)
C(x - 3)(x - 6)
D(x - 3)(x + 6)
E(-x + 3)(x + 6)
FThis polynomial cannot be factored by grouping.

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#19 2011-07-21 09:07:25

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

i really need help on this this is what i did

so the polynomial is

8x^2+47x+28

(8x^2+7x)+(4x+28)

x(8x+7)+4(x+7)

so i choose (A)

8x^2 + 47x + 28

AThis polynomial cannot be factored by grouping.
B(3x + 7)(5x - 4)
C(3x - 7)(5x - 4)
D(3x + 7)(-5x + 4)
E(-3x + 7)(-5x + 4)
F(3x + 7)(5x + 4)

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#20 2011-07-21 09:12:49

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Factoring Polynomials

Hi zeef;

Did you check to see whether any of the other answers work?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#21 2011-07-21 09:21:21

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

for the first one yeah the second i tried it like allot  of times i just got sick of it and gave up

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#22 2011-07-21 09:22:28

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

how do you do polynomial equation in squares method? can anybody give me a link for an explanation or something plzzzz

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#23 2011-07-21 09:29:00

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Factoring Polynomials

Hi;

Let's stop here for a second. Did they teach you FOIL?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#24 2011-07-21 09:31:47

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Factoring Polynomials

nope they didn't teach me the foil its my first time hearing of that method so i did number 7 incorrect ???? can u help me to see what step i did  incorrect

One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

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#25 2011-07-21 09:34:52

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Factoring Polynomials

Hi;

The answer is B for that one, how did you get C?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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