Solving Quadratics with Square Roots

x² = 16

• ± 4
• ± 8
• 4
• 8

Tags

CCSS.8.EE.A.2

3x² = 12

• ± 2
• 2
• ± √12
• ± 4

Tags

CCSS.8.EE.A.2

x² + 4 = 68

• ± 8
• ± √8
• 8
• ± 64

Tags

CCSS.8.EE.A.2

7x² + 1 = 8

• ± 1
• ± 7
• ± √7
• ± 8

Tags

CCSS.8.EE.A.2

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

-5x² = -500

• no solution

• +25, -25

• +100, -100

• +10, -10

Tags

CCSS.8.EE.A.2

m² - 12 = 109

• +11, -11

• +121, -121

• +97, -97

• no solution

Tags

CCSS.8.EE.A.2