Solve quadratics by square root

Solve by taking the square root:

x² = 49

• -7

• 7

• 49

• ±7

Tags

CCSS.HSA-REI.B.4B

Solve by taking square roots:
k² - 6 = 43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• no solution

Tags

CCSS.HSA-REI.B.4B

Solve by taking the square root:

4x² = 100

• ±10

• ±25

• ±5

• 5

Tags

CCSS.HSA-REI.B.4B

Solve for h.
(h - 2)² = 9

• h = 5, -1
• h = 5, -5
• h = 5
• h = -1

Tags

CCSS.HSA-REI.B.4B

Solve for x.

2(x + 5)² = 28

• x = 5 ± √14

• x = -5 ± 2√7

• x = -5 ± √14

• x = 5 ± 2√7

Tags

CCSS.HSA-REI.B.4B

x² + 25 = 0

• 5, -5

• 5

• 5i, -5i

• $\sqrt{5},\ -\sqrt{5}$