Solving Quadratics with Square Roots

m² - 12 = 109

• +11, -11

• +121, -121

• +97, -97

• no solution

Tags

CCSS.8.EE.A.2

x² -10 = -1

• no solution

• +11, -11

• +9, -9

• +3, -3

Tags

CCSS.8.EE.A.2

x² + 17 = 13

• +2, -2

• +4, -4

• +2i, -2i

• +20, -20

Tags

CCSS.HSA-REI.B.4B

2x² + 1 = 163

• + 81, -81

• +162, -162

• +9, -9

• no solution

Tags

CCSS.8.EE.A.2

1/3x² = 48

• +16, -16

• +4, -4

• +12, -12

• no solution

Tags

CCSS.8.EE.A.2

Pick which equation I can use square roots to solve:

• 3x² + 2x + 1 = 0

• 3x² -27 = 0

• 3x² + 2x = 1

• 4x + 10 = 0

Tags

CCSS.HSA-REI.B.4B

(x + 1) ² = 25

• ± 5
• 4  or  -6
• -4  or  6
• ± 4

Tags

CCSS.HSA.REI.B.4

(x - 2) ² = 9

• ± 3
• 5  or  -1
• -5  or  1
• ± 9

Tags

CCSS.HSA-REI.B.4B

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.8.EE.A.2

What are the roots of this quadratic function?

• -4 and 0

• 4 and 0

• -2 and 4

• 0

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.APR.B.3