Solutions to Quadratics Using Square Roots

• A
• B
• C
• D

x² - 15 = 0

• {15, -15}

• {3.87, -3.87}

• {7.5, -7.5}

• No Solution

What are the solutions?

• 0 and 8

• -2 and -4

• 3 and -1

• 2 and 4

Solve
16a² - 9 = 0

• a = ^-3/₄, ³/₄ 

• a = ^-4/₃, ⁴/₃ 

• a = ^-9/₁₆, ⁹/₁₆ 

• a = ^-16/₉, ¹⁶/₉ 

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

• m = 0

• m = 1 or -1

• m = √7

• m = 7/5 m = -7/5

Solve for x
x² - 3 = 78

• -9,9

• 9

• -9

• -√75, √75

Solve the equation
4x² - 25 = 0

• 5/2, -5/2

• 5/2, 5/2

• -5/2, -5/2

• -5/2, 5/2

Solve by taking square roots:
5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no solution

Solve by taking square roots:
k² - 6 = 43

• k = √37

• k = 37 or - 37

• k = 7, k = -7

• no solution

Solve the equation using square roots.
x² = 121

• 60.5

• ± 11

• ± 12

• 11