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#1 2011-07-21 21:56:31
- zee-f
- Super Member
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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
#2 2011-07-21 22:09:50
- anonimnystefy
- Real Member
Online
Re: Factoring Polynomials
hi zee-f
1 is correct!2 is incorrect(hint:look at the signs).3 and 4 are also correct.
The limit operator is just an excuse for doing something you know you can't.
It's the subject that nobody knows anything about that we can all talk about! ― Richard Feynman
A secret's worth depends on the people from whom it must be kept. ― Carlos Ruiz Zafσn
#5 2011-07-21 22:56:10
- bobbym
- Administrator
Online
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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#7 2011-07-22 00:07:00
- bobbym
- Administrator
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Re: Factoring Polynomials
What does the problem look like?
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#9 2011-07-22 00:30:49
- bobbym
- Administrator
Online
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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#10 2011-07-22 00:35:23
- zee-f
- Super Member
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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
#11 2011-07-22 00:37:29
- bobbym
- Administrator
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Re: Factoring Polynomials
Hi;
A is correct, what did you get?
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#13 2011-07-22 00:40:52
- bobbym
- Administrator
Online
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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#15 2011-07-22 00:50:28
- bobbym
- Administrator
Online
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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#16 2011-07-22 01:10:00
- zee-f
- Super Member
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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
#17 2011-07-22 01:29:04
- anonimnystefy
- Real Member
Online
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)
the answer is D
The limit operator is just an excuse for doing something you know you can't.
It's the subject that nobody knows anything about that we can all talk about! ― Richard Feynman
A secret's worth depends on the people from whom it must be kept. ― Carlos Ruiz Zafσn
#18 2011-07-22 06:54:30
- zee-f
- Super Member
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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.
so my answer is c
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
#19 2011-07-22 07:07:25
- zee-f
- Super Member
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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
#20 2011-07-22 07:12:49
- bobbym
- Administrator
Online
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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#23 2011-07-22 07:29:00
- bobbym
- Administrator
Online
Re: Factoring Polynomials
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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#24 2011-07-22 07:31:47
- zee-f
- Super Member
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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
#25 2011-07-22 07:34:52
- bobbym
- Administrator
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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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.