9.7 Homework

x² = 81

• 9

• 81

• ±9

• -9

Solve

-x² = -100

• x = -10

• x = ±10

• x = ±√10

• No real solution

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

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

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

• ±81
• ±9
• ±3
• No real solution

• √3

• ±√3

• -3

• No real solution

Solve by taking square roots:

5b² - 4 = 41

• b = ± 9

• b = ±3

• b = 8, b = -8

• no solution

Solve
4m² - 100 = 0

• m=25, -25
• m=96
• m=5, -5
• m=-96

Tags

CCSS.8.EE.A.2

Solve 4b² - 16 = 0.

• 4 and -7

• 7 and -4

• 2 and -2

• No real solution

Solve by taking square roots:
k² - 6 = 43

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