Question

How do you solve `x^2-15x+54=0`?

Answer 1

`x=6` or `x=9`

Explanation:

`x^2-15x+54=0`

Factorise.

`x^2-9x-6x+54=0`

`x(x-9)-6(x-9)=0`

`(x-6)(x-9)=0`

`x-6=0` or `x-9=0`

`x=6` or `x=9`