Solving Quadratic Equations by Extracting Square Roots

What are the roots of the quadratic equation 3t² = 12?

• t =4 and t = -4

• t = 2 and t = -2

• t = 3 and t = -3

• t = 9 and t = -9

Tags

CCSS.HSA-REI.B.4B

What is the solution of the equation a² – 60 = 21?

• positive or negative 4

• positive or negative 6

• positive or negative 7

• positive or negative 9

Tags

CCSS.8.EE.A.2

Which of the following quadratic equations can be solved easily by extracting the square roots?

• x² + 7x +12 = 0

• 2w² + 7w - 3 = 0

• 3v² + 2v - 8 = 0

• 4t² - 9 = 0

Tags

CCSS.HSA-REI.B.4B

Solve for the roots of the quadratic equation.

x² = 49

• ±5

• ±7

• ±8

• ±9

Tags

CCSS.HSA-REI.B.4B

Solve for the roots of the quadratic equation.

x² = 18

• ±3

• ±6

• ±3√2

• ±2√3

Tags

CCSS.8.EE.A.2

Solve for the roots of the quadratic equation.

x² = 36

• ±3

• ±4

• ±6

• ±9

Tags

CCSS.HSA-REI.B.4B

Solve for the roots of the quadratic equation.

x² = 81

• ±6

• ±7

• ±8

• ±9

Tags

CCSS.8.EE.A.2

Solve for the roots of the quadratic equation.

x² = 32

• ±3

• ±4√2

• ±3√2

• ±2√3

Tags

CCSS.8.EE.A.2

Solve for the roots of the quadratic equation.

x² = 121

• ±9

• ±10

• ±11

• ±13

Tags

CCSS.8.EE.A.2

Solve for the roots of the quadratic equation.

7x² = 63

• ±3

• ±4√2

• ±3√2

• ±2√7

Tags

CCSS.8.EE.A.2