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#27 2011-07-22 07:41:09
- bobbym
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Re: Factoring Polynomials
-6 x - 3 x = -9 x not -3 x
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.
#29 2011-07-22 07:49:04
- bobbym
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Re: Factoring Polynomials
Yes, but you have to group so that it so that it still equals the original polynomial.
x^2-6x-3x-18 does not equal x^2-3x-18
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.
#30 2011-07-22 08:35:15
- bobbym
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Re: Factoring Polynomials
Hi zeef
Try this grouping:
x^2 + 3x - 6x - 18
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.
#32 2011-07-22 09:25:12
- bobbym
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Re: Factoring Polynomials
Hi;
Not exactly, do it this way:
x ( x + 3 ) - 6 ( x + 3 )
( x + 3 ) ( x - 6 ) is the factorization.
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.
#33 2011-07-22 17:49:42
- bob bundy
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Re: Factoring Polynomials
hi zee-f
You wrote:
does anybody know a good website that teaches you Factoring Polynomials using grouping
and bobbym wrote:
I can not think of a better one than here.
Of course I agree with this ... and who better to help than bobbym. 
But, having said that you might like to look at
http://www.youtube.com/watch?v=2Q8lG1WaqJY
There are three examples there that take you through a prescriptive method using grouping.
Bob
Last edited by bob bundy (2011-07-22 17:52:46)
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
#34 2011-07-23 07:48:52
- zee-f
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Re: Factoring Polynomials
ok so this is what the question says Factor problems 9 - 12 by using the difference of squares method. what on earth does that mean ????
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
#35 2011-07-23 07:56:05
- bobbym
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Re: Factoring Polynomials
Hi bob bundy;
and who better to help than bobbym
Yikes! Let me tell you about him. Took two bullets straight through his head in 67. Yes clean through, nowadays people use his head in place of binoculars. I mean should we listen to a guy who the wind does not have to go around his head?
Hi zee-f;
Can you please bring those problems down here? Did you watch bob bundy's video?
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.
#36 2011-07-23 08:02:04
- zee-f
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Re: Factoring Polynomials
yup i willl but i dont just want the answer i want help on the method plz
9. x^2 4
AThis polynomial cannot be factored by using the difference of squares method.
B(x 2)(x 2)
C(x 2)(x 1)
D(x 2)(x + 2)
E(x 1)(x 4)
F(x + 2)(x + 2)
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
#37 2011-07-23 08:09:45
- bobbym
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Re: Factoring Polynomials
Hi;
I like D) here is why.
http://www.mathsisfun.com/algebra/speci … ducts.html
http://www.mathsisfun.com/algebra/factoring.html
And then go here and you will know as much about it as I do!
http://regentsprep.org/REgents/math/ALG … factps.htm
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.
#38 2011-07-23 08:26:48
- zee-f
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Re: Factoring Polynomials
thanx allllot am ganna see the links and do the rest of the problems ill submit my answers tomorrow to make sure thanx allot guyyys
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
#39 2011-07-23 08:28:34
- bobbym
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Re: Factoring Polynomials
Okay! I will wait to see your answers. And please watch the video! I am watching it now.
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.
#40 2011-07-23 19:12:55
- bob bundy
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Re: Factoring Polynomials
hi zee-f
Difference of two squares.
When there is no 'x' term, it has disappeared because there was a plus term and a minus term that cancelled out. (see picture)
That leaves an x squared term and a minus term, which will also be a perfect square. (in my diagram '4' is a perfect square because it is 4 = 2 x 2 )
So you have the difference of two squares, x squared and two squared.
Does that help you to see which answer MUST be correct?
Bob
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
#41 2011-07-23 23:08:05
- zee-f
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Re: Factoring Polynomials
hey guys thanx allot for all this help and sources it helped me solve my problems this is what i got
for #9 i got d and 10-D 11-E 12-D
Factor problems 9 - 12 by using the difference of squares method.
9. x^2 4
AThis polynomial cannot be factored by using the difference of squares method.
B(x 2)(x 2)
C(x 2)(x 1)
D(x 2)(x + 2)
E(x 1)(x 4)
F(x + 2)(x + 2)
10. x^2 25
A(-x 5)(x - 5)
BThis polynomial cannot be factored by using the difference of squares method.
C(-x + 5)(x + 5)
D(x 5)(x + 5)
E(x + 5)(-x - 5)
F(x 5)(x - 5)
11. 36x^4 4x^2
A(6x^2 2x)(6x^2 - 2x)
B(6x^2 + 2x)(6x^2 + 2x)
CThis polynomial cannot be factored by using the difference of squares method.
D(-6x^2 2x)(-6x^2 - 2x)
E(6x^2 2x)(6x^2 + 2x)
F(-6x^2 + 2x)(6x^2 - 2x)
12. x^2 + 100
A(x + 10)(x 10)
B(-x + 10)(x 10)
C(x + 10)(x + 10)
DThis polynomial cannot be factored by using the difference of squares method.
E(x - 10)(x 10)
F(-x + 10)(-x 10)
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
#42 2011-07-23 23:10:19
- anonimnystefy
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Re: Factoring Polynomials
all is correct.good job.
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#45 2011-07-23 23:16:10
- bobbym
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Re: Factoring Polynomials
Hi zee-f;
You did well!
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.
#47 2011-07-23 23:21:28
- bobbym
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Re: Factoring Polynomials
Did you get around to watching that video?
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.
#49 2011-07-23 23:22:59
- bobbym
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Re: Factoring Polynomials
Yes, I watched it too and liked it.
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.