Question

Can someone help me with my math ^^

The question is in the picture

Answer 1

in what case you see this form of

a^2 -b^2

Answer 2

thats not in any of them, thats why I'm confused

Answer 3

@person321

it doesn't look directly like that formula because you need to factor out the greatest common factors first.

For example:
We can factor out a (5x^2) out of \(5x^4+20x^2\)
so that it looks like
\(5x^2 (x^2 + 4)\)

then we can see that the \(x^2+4\) is technically a "sum of perfect squares" but since we want the DIFFERENCE of perfect squares, E is NOT an answer - but that show's you the strategy