# How do you solve #5x^2 - 90 = 0#?

##### 1 Answer

Jul 12, 2016

#### Answer:

#### Explanation:

Usually to solve a quadratic equation, we make it equal to 0.

However in this case, as there is no term in x, we can use a different method.

If the constant had been a perfect square we could have factorised as difference of two squares, but 18 is not a square.