Question

What is the expression in factored form?
5x^2 – 80y^2

Show work please.

Answer 1

Try factoring the 5, you might see something then!

Answer 2

As in, do common factoring and take out a 5 of both terms.

Answer 3

5(x^2-16y^2) now what

Answer 4

You should notice something: difference of squares.

Answer 5

Last time I did this was like 2 years ago so it's all shady in my memory haha. so somehting like 5(x+4y)(x-4y)?

Answer 6

Good job :) That's exactly it. You can test it by foiling if you want.

Answer 7

Thanks!