# How do you solve #x^2+15x=0#?

##### 2 Answers

Jul 15, 2016

#### Explanation:

Factoring

gives

which implies

either

or

Jul 15, 2016

#### Explanation:

The first approach is always to try and factorise the quadratic. Although this is not a trinomial, there is a common factor.

Because the product is 0, one of the two factors must be equal to 0.

Either

This gives two solutions, exactly what we expect with a quadratic.