Solving Quadratic Equations Using Square 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.8.EE.A.2

x²−10=19

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

Tags

CCSS.8.EE.A.2

3x²+12=39

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

Tags

CCSS.HSA.CED.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.4

Solve using square roots.

• ±81
• ±9
• ±3
• No real solution

Tags

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

Solve using square roots.

• √3
• ±√3
• -3
• No real solution

Tags

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

Solve using square roots.

• ± 1/4
• ± 9/36
• ± 1/2
• No real solution

Tags

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

Solve using square roots.
5b² - 4 = 41

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

Tags

CCSS.HSA.REI.B.4