Solving Quadratics Using the Square Root Method

x² = 16

• ± 4
• ± 8
• 4
• 8

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.REI.A.1

3x² = 12

• ± 2
• 2
• ± √12
• ± 4

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.CED.A.1

-5x² = -50

• ± 5
• ± 10
• ± √10
• -10

Tags

CCSS.HSA.REI.B.4

x² + 4 = 68

• ± 8
• ± √8
• 8
• ± 64

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.APR.B.3

CCSS.HSA.CED.A.1

7x² + 1 = 8

• ± 1
• ± 7
• ± √7
• ± 8

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.REI.A.1

(x + 1) ² = 25

• ± 5
• 4  or  -6
• -4  or  6
• ± 4

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.REI.A.1

(x - 2) ² = 9

• ± 3
• 5  or  -1
• -5  or  1
• ± 9

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.REI.A.1

CCSS.HSA.CED.A.1

What are the solutions?

• 0 and 8
• -2 and -4
• 3 and -1
• 2 and 4

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.APR.B.3

CCSS.HSA.REI.D.11

CCSS.HSA.REI.C.7

What are the x- intercepts?

• x= 0 and x= -4
• x= 0 and x= 4
• y= 0
• x= 2

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.APR.B.3

CCSS.HSA.REI.D.11

CCSS.HSA.REI.D.10

Solve for x     x² - 4 = 76

• x = 4 , -4
• x = 4√5    ,  -4√5
• x = 80   ,  x = -80
• x = 5√4    or    -5√4

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.REI.A.1