Help with Factoring!
Favorites|Homepage
Subscriptions | sitemap
HOME > > Help with Factoring!

Help with Factoring!

[From: ] [author: ] [Date: 12-01-26] [Hit: ]
how do you factor those two problems?= (2x + 1)(x + 3)(x - 3)-For the first one,For the second one,Then,......
So, this quarter I started math141 and we're doing review stuff right now, mainly factoring and graphing, things like that.
On a quiz we were told to factor this:
100x^2 - 100

and also:
(2x + 1)x^2 - (2x + 1)9

I factored them the way I was taught to in math 098, but apparently I did it wrong. Now, I completely understood everything in math 098, passed with an A easily so it's not that I just didn't know how to do it.
But, now everything I do is wrong according to this teacher.
So, my question is, how do you factor those two problems?

-
100x^2 - 100
= 100(x^2 - 1)
= 100(x + 1)(x - 1)

(2x + 1)x^2 - (2x + 1)9
= (2x + 1)(x^2 - 9)
= (2x + 1)(x + 3)(x - 3)

-
For the first one, you factor out the 100 so that you have:
100 (x^2 - 1)

Then you factor the (x^2 - 1) so that it becomes:
100 (x +1) (x - 1)


For the second one, you factor out the (2x +1) so that you get:
(2x +1) (x^2 - 9)

Then, factor the (x^2 - 9) to get:
(2x +1) (x + 3) (x - 3)
1
keywords: Help,with,Factoring,Help with Factoring!
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .