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

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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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

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

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

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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,808

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.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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

how can i factor by grouping if theirs only three terms

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,808

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.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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

x^2 2x + 1

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,808

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.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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

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.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,808

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.**

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

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,808

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.**

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

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,808

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.**

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

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

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

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)

the answer is D

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

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.

so my answer is c

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

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)

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,808

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.**

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

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

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

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,808

Hi;

Hold on, I agree with your answer of A.

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.**

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

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,808

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.**

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