Question

How do you solve using this equation (`2x^2 = 40`) using the square root property?

Answer 1

We first divide both sides by `2` to get `x^2=20`

Explanation:

Then we take the square root at both sides, but remember that both

`sqrt20and -sqrt20` give `20` when squared.

So `x_(1,2)=+-sqrt20=+-2sqrt5` (two answers)