Solving Quadratic Equations by Extracting Square Roots

How many solution does a quadratic equation x² - 9 = 16 have ?

• none

• 1

• 2

• 3

Tags

CCSS.HSA-REI.B.4B

What are the roots / solutions of the quadratic equation 3x² = 300 ?

• x = 10

• x = 9

• x = + 9

• x = + 10

Tags

CCSS.HSA-REI.B.4B

What are the roots / solutions of the quadratic equation x² = 32?

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:

5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no solutionb

Tags

CCSS.HSA-REI.B.4B

Solve the equation using square roots.
x² = 121

• 60.5

• ± 11

• ± 12

• 11

Tags

CCSS.8.EE.A.2

x² -4 = 77

• 9

• -9

• No Real Solutions

• ±9

Tags

CCSS.HSA-REI.B.4B

x²=25

• x = 5

• x = -5

• x = ±25

• x = ±5

Tags

CCSS.8.EE.A.2

Solve using square roots.

• ±81

• ±9

• ±3

• No real solution

Tags

CCSS.HSA-REI.B.4B

• A
• B
• C
• D

Tags

CCSS.8.EE.A.2