Question

How do you solve `x^2 + 9x + 9 = 0`?

Answer 1

`x=(-9+-3sqrt5)/2`

Explanation:

`x^2+9x=-9`
`x^2+9x+81/4=-9+81/4`
`(x+9/2)^2=45/4`
`(x+9/2)=(+-3sqrt5)/2`
`x=(-9+-3sqrt5)/2`