Solving Quadratic Equations Using Square Roots

x²=25

• x = 5

• x = -5

• x = ±25

• x = ±5

Solve x²− 4 = 0

•  2 and -2

• 4 and -4

• 16 and -16

• 8 and -8

Solve using square roots.

• ±81

• ±9

• ±3

• No real solution

Solve using square roots.

• ± 1/4

• ± 9/36

• ± 1/2

• No real solution

Solve using square roots:

x² - 18 = 0

• x = ±√18

• No solution

• x = ±9

• x = 18

x² = 16

• ± 4

• ± 8

• 4

• 8

Solve the equation using square roots.
x² = 121

• 60.5

• ± 11

• ± 12

• 11

3x² = 12

• ± 2

• 2

• ± √12

• ± 4

Solve using square roots:

-7x² = -91

• x = 1 or x = -1

• No real solutions.

• x = 3.6

• x = 3.6 or x = -3.6

(x-5)² = 25

• ±0

• ±10

• 10, 0

• -10, 0