### Home > A2C > Chapter 7 > Lesson 7.1.3 > Problem 7-39

7-39.

Cheri has forgotten how to change a quadratic equation from standard form to graphing form. She remembers *some* things about averaging intercepts and completing the square, but she is really confused. Clearly show Cheri *both* methods to change *y* = *x*^{2} + 4*x* − 7 into graphing form. Homework Help ✎

Try making a generic rectangle to complete the square.

You will probably need to use the quadratic formula to average the intercepts.

*y* = (*x* + 2)^{2} − 11