Solving Quadratics by Taking Square Roots

Solve for x

x² = 64

• x = 8, -8

• x = 32, -32

• x = 4, -4

• No real solution

Tags

CCSS.8.EE.A.2

Solve for x

3x² - 27 = 0

• x = 4.9, -4.9

• x = 9, -9

• x = 3, -3

• No solution

Tags

CCSS.8.EE.A.2

Solve using square roots.
k² - 6 = 43

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

Tags

CCSS.8.EE.A.2

Solve using square roots.
5b² - 4 = 41

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

Tags

CCSS.8.EE.A.2

3.  Solve the equation
4x² - 25 = 0

• 5/2, -5/2
• 5/2, 5/2
• -5/2, -5/2
• -5/2, 5/2

Tags

CCSS.HSA-REI.B.4B

Solve:  $x^2+8=28$  

• No solution

•  $x=\pm4\sqrt{5}$  

•  $x=\pm6$  

•  $x=\pm2\sqrt{5}$  

Tags

CCSS.8.EE.A.2

Solve:  $7x^2=-21$  

•  $x=\pm\sqrt{3}$  

• No solution

•  $x=\pm2\sqrt{7}$  

•  $x=\pm\sqrt{14}$  

Tags

CCSS.8.EE.A.2

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

Tags

CCSS.8.EE.A.2

• A
• B
• C
• D

Tags

CCSS.8.EE.A.2

• A
• B
• C
• D

Tags

CCSS.8.EE.A.2