Solving Quadratics by Square Roots

Solve for x

x² = 64

• x = 8, -8

• x = 32, -32

• x = 4, -4

• No real solution

Tags

CCSS.8.EE.A.2

Solve for x

3x² - 27 = 0

• x = 4.9, -4.9

• x = 9, -9

• x = 3, -3

• No solution

Tags

CCSS.8.EE.A.2

Solve using square roots.
k² - 6 = 43

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

Tags

CCSS.8.EE.A.2

Solve using square roots.
5b² - 4 = 41

• b = 9, b = -9
• b = 3, b = -3
• b = 8, b = -8
• no solution

Tags

CCSS.8.EE.A.2

Solve using square roots.
4m² - 100 = 0

• m=25, -25
• m=96
• m=5, -5
• m=-96

Tags

CCSS.HSA.REI.B.4

Solve using square roots.

• ±81
• ±9
• ±3
• No real solution

Tags

CCSS.8.EE.A.2

Solve using square roots.

• ±√9
• ±3
• ±1
• No real solution

Tags

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

x² - 15 = 0

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

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

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.A.2

CCSS.HSA.REI.B.4

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