1. Solving Quadratic Equations by Finding Square Roots

2. Solving by Taking square roots
Use when there are ( ) or when there is no x term
Get the x2 or ( )2 by itself
Take square root of each side. Remember when you take a square root, there is a positive answer and a negative one
Solve for x

3. Examples Solve. 3 - 5x2 = -9 -3 -3 -5x2 = -12 -5 -5 x2 =
-5x2 = -12
x2 =
Solve. 3(x-2)2=21
(x-2)2 = 7

4. More Examples!
4. Solve.
Solve. 4x2-6=42
+6 +6
4x2=48
x2 = 12

5. What if there is a negative square root?
5. Solve. 2x2 + 6 = 4
2x2 = -2
x2 = - 1