# math

posted by .

The question is
(2x+1)^2-2(2x^2-1) in simplest form
Is this correct?
[(2x+1)(2x+1)](-4x^2+2)
4x^2+2x+2x+1(-4x^2+2)
4x^2+4x+1(-4x^2+2)
-16x^4-16x^3-4x^2
+ 8x^2+8x+2
_________________________
-16^4-16x^3+4x^2+8x +2
Did I do this correctly?

• math -

the way you typed it , I saw a subraction

(2x+1)^2 - 2(2x^2-1)
= 4x^2 + 4x + 1 - 4x^2 + 2
= 4x + 3

You did

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

• math -

Ok, I see my mistake. Thanks for explaining what I did incorrectly.

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