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August 27, 2014

August 27, 2014

Posted by **Anna** on Monday, March 21, 2011 at 6:05pm.

I've tried to figure it out from the book, but it's not making any sense...

Can someone help?

I'm trying to figure out this problem

1 - 4x^2

- Algebra -
**t**, Monday, March 21, 2011 at 9:29pmYou have to plug 4x^2 into the square root. the answer is 2x because the square root of 4 is 2 and then the x just stays with the 2.

- Algebra -
**tchrwill**, Tuesday, March 22, 2011 at 11:43amThe difference of two squares can be expressed by

(x^2 - y^2) = (x + y)(x - y)

1 - 4x^2 is therefore expressible as

(1 + 2x)(1 - 2x)

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