How do you solve x(x+2)=9?

1 Answer
Jul 22, 2017

All you need to do is to get the quadratic formula:
b±b24ac2a
and plug the values in as is.

Explanation:

x(x+2)=9

Use the order of operations to simplify and combine the equation into one polynomial ax2+bx+c.

x2+2x+9=0

Plug the values in the quadratic formula as shown in the polynomial.

2±224(1)(9)2(1)

Simplify the equation into its solutions.

=2±4362
=2±4i22
=1±2i2