Question

How do you factor `4x^2-36`?

Answer 1

The factors of `4x^2-36` are `4 and x^2-9`

Explanation:

`4x^2-36`
Taking 4 common we get`4(x^2-9)`
The factors of `4x^2-36` are `4 and x^2-9`

`x^2-9` can be factorised further
The factors of `x^2-9` are `(x+3) and (x-3)`