### Home > CCA > Chapter 11 > Lesson 11.3.3 > Problem11-100

11-100.
1. Solve the quadratics below by completing the square. Leave your solutions in exact form. Homework Help ✎

1. x2 − 6x − 12 = 0

2. x2 − 3 = 4x

Add 21 to both sides.

Perfect square form:(x − 3)2 = 21

$\textit{x}=3\pm \sqrt{21}$

Change the quadratic into standard form before trying to change it to perfect square form.

Perfect square form: (x − 2)2 = 7