Solving Quadratics by Square Roots

• ±81
• ±9
• ±3
• No real solution

Tags

CCSS.8.EE.A.2

x² - 15 = 0

• {15, -15}
• {3.87, -3.87}
• {7.5, -7.5}
• No Solution

Tags

CCSS.8.EE.A.2

Solve
16a² - 9 = 0

• a = ^-3/₄, ³/₄ 
• a = ^-4/₃, ⁴/₃ 
• a = ^-9/₁₆, ⁹/₁₆ 
• a = ^-16/₉, ¹⁶/₉ 

Tags

CCSS.HSA-REI.B.4B

Solve by taking square roots:
5m² + 1 = 6

• m = 0
• m = 1 or -1
• m = √7
• m = 7/5 m = -7/5

Tags

CCSS.HSA-REI.B.4B

3.  Solve the equation
4x² - 25 = 0

• 5/2, -5/2
• 5/2, 5/2
• -5/2, -5/2
• -5/2, 5/2

Tags

CCSS.HSA-REI.B.4B

Solve by taking square roots:
k² - 6 = 43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• no solution

Tags

CCSS.HSA-REI.B.4B

Solve for x.

x² = 36

• x = ± 6

• x = ± 18

• x = 6

• x = 18

Tags

CCSS.8.EE.A.2

Solve for x.

3x² = 48

• x = ± 4

• x = ± 12

• x = ± 16

• x = √16

Tags

CCSS.8.EE.A.2

Solve for x.

5(x - 3)² + 1 = 81

• x = -1, 7

• x = -7, 1

• x = ± 9

• x = 3, 10

Tags

CCSS.HSA-REI.B.4B

Solve for x.

2(x + 5)² = 28

• x = 5 ± √14

• x = -5 ± 2√7

• x = -5 ± √14

• x = 5 ± 2√7

Tags

CCSS.HSA-REI.B.4B