Solving Quadratic Equations by Square Roots

Solve by taking the square root:
x² = 49

• -7
• 7
• 49
• -7, 7

Tags

CCSS.HSA-REI.B.4B

Solve by taking the square root:
4x² = 100

• -10, 10
• -25, 25
• -5, 5
• 5

Tags

CCSS.8.EE.A.2

x² = 8

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

Tags

CCSS.8.EE.A.2

2x²=100

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

Tags

CCSS.8.EE.A.2

x² -4 = 77

• 9
• -9
• No Real Solutions
• 9, -9

Tags

CCSS.8.EE.A.2

Solve by taking square roots:
3 + 9r² = 12

• r = 0
• no solution
• r = 3, r = -3
• r = 1, r = -1

Tags

CCSS.8.EE.A.2

Solve for x: 
(x+6)²=49

• x=7,12
• x=±7
• x=1,-13
• x=43,-55

Tags

CCSS.8.EE.A.2

Solve using square roots.

• A
• B
• C
• D

Tags

CCSS.8.EE.A.2

Solve by taking square roots:
(x - 7)² = 99

• x = 7 ± 3√11
• x = -7 ± 3√11
• x = -11 ±√7
• x = 11 ±√7

Tags

CCSS.HSA-REI.B.4B

Solve.
2(2x - 4)² = 32

• x = 4
• x = 10
• x = -2
• x = 0, 4

Tags

CCSS.HSA-REI.B.4B