Question

How do you solve the equation: `4x^2=20`?

Answer 1

`x=+-sqrt5`

Explanation:

We can start by dividing both sides by `4`. Doing this, we get:

`x^2=5`

Next, we can take the square root of both sides to get:

`x=+-sqrt5`

There are no perfect squares to factor out of `sqrt5` so we could simplify this. Thus, `+-sqrt5` is our answer.