Solving Quadratics (Square Root Method)

3x² = 12

• ± 2

• 2

• ± √12

• ± 4

x² + 4 = 68

• ± 8

• ± √8

• 8

• ± 64

7x² + 1 = 8

• ± 1

• ± 7

• ± √7

• ± 8

(x + 1) ² = 25

• ± 5

• 4  or  -6

• -4  or  6

• ± 4

(x - 2) ² = 9

• ± 3

• 5  or  -1

• -5  or  1

• ± 9

Solve by taking square roots:
k² - 6 = 43

• k = √37

• k = 37 or - 37

• k = 7, k = -7

• no solution