Question

Factor the following polynomial completely.

c^2 - 4d^2 =

well I got..
(c-2d)(c+2d)
but its wrong..

But when I work out my answer, I get the original problem. What have I done wrong??

Answer 1

That's right.

Answer 2

Well, if it is\[c^2 - (4d)^2 \]then it is wrong.

Answer 3

c^2-(2d)^2 use formula a^2-b^2-(a+b)(a*b)

Answer 4

But as far as I see here, there is no mistake.

Answer 5

No it is just d being squared, not 4d.

Answer 6

Then you are correct!\[\Huge \ddot \smile \]

Answer 7

Yayy! Thanks :) Haha

Answer 8

(And thanks everyone else too!)