Solving Quadratic Equations using Square Roots

Solve by taking the square root:
(x + 6)² = 1

• -5, -7
• 5, 7
• 5, -7
• -5, 7

Tags

CCSS.HSA-REI.B.4B

Solve by taking the square root:
2(x - 3)² - 14 = 18

• 1, 7
• -1, 7
• -1, -7
• 1, -7

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.2

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.B.4B

Solve for x: 
(x+6)²=49

• x=7,12
• x=±7
• x=1,-13
• x=43,-55

Tags

CCSS.8.EE.A.2

3x² - 1 = 14

• 5
• -√5
• -√5, √5
• √5

Tags

CCSS.8.EE.A.2

Solve 81x²-20=5

• x=5, x=-5

• x=5/9, x=-5/9

• 81x²=25

• x=25/81, x=-25/81

Solve using square roots.
7b² - 4 = 59

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

Tags

CCSS.8.EE.A.2

2x²= 30

• x= √5
• x= √30
• x= √15
• x= ±5

Tags

CCSS.8.EE.A.2

3x²+12=39

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

Tags

CCSS.8.EE.A.2