Solve Quadratics by Square Roots

Solve by taking the square root:

x² = 49

• -7

• 7

• 49

• ±7

x² -4 = 77

• 9

• -9

• -9i

• ±9

Solve by taking square roots:
k² - 6 = 43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• k= 7i, -7i

Solve by taking the square root:

4x² = 100

• ±10

• ±25

• ±5

• 5

Solve by taking square roots:
5b² - 4 = 41

• b = 9, b = -9
• b = 3, b = -3
• b = 8, b = -8
• b= 3i, -3i

Solve for x.
-9x² = -576

• x = 8
• x = 64
• x = 8, -8
• x = 64, -64

Solve for x.

x² = 36

• x = ± 6

• x = ± 18

• x = 6

• x = 18

Solve using square roots.
k² - 6 = -43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• k = i√37, -i√37

Solve using square roots.
5b² + 4 = -41

• b = 9, b = -9
• b = 3, b = -3
• b = 8, b = -8
• b = 3i, -3i

Solve by taking square roots:
5m² + 1 = 6

• m = 0
• m = 1 or -1
• m = √7
• m = 7/5 m = -7/5