### Home > CCA > Chapter 11 > Lesson 11.3.5 > Problem11-128

11-128.

Solve the quadratic equation below three times: once by completing the square, once by factoring and using the Zero Product Property, and once by using the Quadratic Formula. Make sure you get the same answer using both methods!

$x^2+14x+40=-5$

First, change to standard form.
$x^2+14x+45=0$

$x=-5$ or $-9$