Solve Quadratics Using Square Roots

3x²+12= 39 (solve using square roots)

• x = √27

• x = ±3√27

• x = ±3

• x = ±9

Tags

CCSS.8.EE.A.2

Solve using square roots.
7b² - 4 = 59

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no solution

Tags

CCSS.8.EE.A.2

solve using square roots

• ±72

• ±12

• 12

• No real solution

Tags

CCSS.HSA-REI.B.4B

• ± 1/4
• ± 9/36
• ± 1/2
• No real solution

Tags

CCSS.8.EE.A.2

±81

±9

±3

No real solution

• ±81

• ±9

• ±3

• No real solution

Tags

CCSS.8.EE.A.2

• A
• B
• C
• D

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.

• A

• B

• C

• D

Tags

CCSS.HSA-REI.B.4B

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.8.EE.A.2

Solve for x
x² - 3 = 78

• -9,9

• 9

• -9

• -√75, √75

Tags

CCSS.8.EE.A.2