Solving Quadratic Equations by Taking Square Root

Solve by taking the square root:

4x² = 100

• x = ±10

• x = ±25

• x = ±5

• x = 5

Solve using square roots.

• ±81

• ±9

• ±3

• No real solution

Solve using square roots.

• ± 1/4

• ± 9/36

• ± 1/2

• No real solution

Solve by taking square roots:
(x - 7)² = 99

• x = 7 ± 3√11

• x = -7 ± 3√11

• x = -11 ±√7

• x = 11 ±√7

Solve using square roots.

• ±81

• ±9

• ±3

• No real solution

Solve using square roots.
5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no solution

• A

• B

• C

• D