Solve Quadratics by Taking Square Roots

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
(x-5)² = 25

• ±0
• ±10
• 10, 0
• -10, 0

Tags

CCSS.HSA-REI.B.4B

Solve by taking square roots:
k² - 6 = 43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• no solution

Tags

CCSS.HSA-REI.B.4B

x²=16

• x= 4, -4

• 
• x=16,-16

• x=2,-2

x²-1=3

• 
• 
• x=1,-1

• x=2,-2

Tags

CCSS.HSA-REI.B.4B

x²+7=20

• x=13, -13

• 
• 
• x=27, -27

Tags

CCSS.8.EE.A.2

3x² = 99

• √33

• √33, -√33

• No Real Solutions

• -√33

Solve the equation using square roots
4x² - 25 = 0

• 5/2, -5/2
• 5/2, 5/2
• -5/2, -5/2

Find the approximate value of x.

x² = 8

• x = ±4

• x = ±2.83

• x = ±5.66

• x = ±√4

2x²=100

Simplify your answer.

• x = ±25

• x = ±√50

• x = ±√100

• x = ±5√2