Solving Using Square Roots

x² = 16

• ± 4
• ± 8
• 4
• 8

Tags

CCSS.8.EE.A.2

-5x² = -50

• ± 5
• ± 10
• ± √10
• -10

Tags

CCSS.8.EE.A.2

x² + 4 = 68

• ± 8
• ± √8
• 8
• ± 64

Tags

CCSS.8.EE.A.2

7x² + 1 = 8

• ± 1
• ± 7
• ± √7
• ± 8

Tags

CCSS.8.EE.A.2

Solve by taking square roots:

3 + r² = 12

• r = $\pm\sqrt{12}$ - 3
  

• r = 3, r = - 3

• r = -3

• r = 3

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

Solve
(x-5)² = 25

• ±0
• ±10
• 10, 0
• -10, 0

Tags

CCSS.HSA.REI.B.4

Solve
(x+3)²-5 = 9

• ±√14 -3
• √14 - 3
• ±11
• ±5

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

3 (x - 2)² + 4 = 79

• x = 3, x = 7

• x = -3, x = 7

• x = $\pm\sqrt{\frac{87}{3}}$
  

• x = $\pm\frac{\sqrt{39}}{3}$
  

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

3( x+3 )² = 27

• x = 3, x = -3

• x = 0

• x = 6, x = 0

• x = 0, x = -6

x² = 25

• x = -5

• x = 5i, x = -5i

• x = 5

• x = 5, x = -5