Solving Quadratic Equations using Square roots

2x²= 30

• x= √5
• x= √30
• x= √15
• x= ±5

Tags

CCSS.8.EE.A.2

x²=25

• x = 5
• x = -5
• x = ±25
• x = ±5

Tags

CCSS.8.EE.A.2

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.8.EE.A.2

(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

(x - 7)² = 5

• x = 7-√5
• x = 7+√5
• x = √5
• x = 7±√5

Tags

CCSS.HSA-REI.B.4B

What are the solutions to 2(x−7)² = 32 ?

• 7±√32
• ±√65
• 3 and 11
• -1 and 15

Tags

CCSS.HSA-REI.B.4B

Solve x²− 4 = 0

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

Tags

CCSS.HSA-REI.B.4B

x² = 8

• x = ±4
• x = ±2√2
• x = ±4√2
• x = ±√4

Tags

CCSS.8.EE.A.2