Question

factor completely 5x^2-20y^2

Answer 1

difference of squares

Answer 2

What?

Answer 3

\[(\sqrt{5}x+\sqrt{20}y)(\sqrt{5}x-\sqrt{20}y), Exapand\quad me\]

Answer 4

I don't know what that is...

Answer 5

\[a^2-b^2=(a+b)(a-b)\]

Answer 6

So.. 5x^2-20y^2=(5x^2+20y^2)(5x^2-20y^2)?

Answer 7

Do you know how to expand brackets, or foil method?

Answer 8

Have you ever factored before?

Answer 9

I've never heard of expanding brackets but I can FOIL. No, I have never factored before.