Question

What is the factored form of
`x^2-36z^2`?

Answer 1

`x^2-36z^2`


`(x-6z)(x+6z)`


`because...`


`x*x=x^2`


`x*6z=6xz \\ -6z*x=-6xz \\ 6xz-6xz=0`


`-6z*6z=-36z^2`