Question

How do you solve `-6x=x^2+9`?

Answer 1

`x=-3`

Explanation:

`x^2+6x+9=0` set the equation equal to 0
`x^2+3x+3x+9=0` find two numbers that MULTIPLY to 9, ADD to 6
`x(x+3)+3(x+3)=0` factor out GCF
`(x+3)(x+3)=0`
`x=-3`