Solving Q.E. by Extracting Square Roots and Factoring

Solve by the Extraction of Roots method: x² = 16

• 4 and -4

• 4

• 8 and -8

• 8

Tags

CCSS.HSA-REI.B.4B

Solve by the Extraction of Roots method: -5x² = -50

• ± 5

• ± √10

• ± 10

• -10

Tags

CCSS.HSA-REI.B.4B

Solve by the Extraction of Roots method: (x - 2) ² = 49

• ± 9

• ± 7

• ± 5

• 9 or -5

Tags

CCSS.HSA-REI.B.4B

What should you do first in solving this equation?

x² + 6x - 13 = 3

• Get factored form

• Make it equal 0 by subtracting 3 on each side

• Write down: a=1, b=6, c=-13

• Type it all in a calculator.

Tags

CCSS.HSA-REI.B.4B

Solve by factoring: x² = 7x + 18

• -7 and -18

• 9 and 2

• 9 and -2

• 2 and 7

Tags

CCSS.HSA-REI.B.4B

Solve using square roots.

4m² - 100 = 0

• m=25, -25

• m=5, -5

• m=96

• m=-96

Tags

CCSS.8.EE.A.2

Solve using square roots.

5b² - 4 = 41

• b = 9, b = -9

• b = 8, b = -8

• b = 3, b = -3

• no solution

Tags

CCSS.8.EE.A.2

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

• none

• 2

• 1

• 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.8.EE.A.2

What are the roots / solutions of the quadratic equation equation 2x² + 3 = 101 ?

• x = + 7

• x = + 9

• x = + 8

• x = + 10

Tags

CCSS.8.EE.A.2