Solving Equations with Square and Cube Roots

2x²= 30

• x= √5
• x= √30
• x= √15
• x= ±5

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

x²=25

• x = 5
• x = -5
• x = ±25
• x = ±5

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

2x²=100

• x = √25
• x = ±5√2
• x = √100
• x = ±√5

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

x²−10=19

• x = √29
• x = ±2√9
• x = ±29
• x = ±5√19

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

3x²+12=39

• x = √27
• x = ±3√27
• x = ±3
• x = ±9

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

(x + 3)² = 36

• x = √36
• x = √39
• x = -9 and x = 3
• x = 9 and x = -3

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

Solve x²− 4 = 0

•  2 and -2
• 4 and -4
• 16 and -16
• 8 and -8

Tags

CCSS.HSA-REI.B.4B

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

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

Tags

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

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

• b = 9, b = -9
• b = 3, b = -3
• b = 8, b = -8
• no solutionb

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

Solve using square roots.

• ±72
• ±12
• 12
• No real solution

Tags

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4