Solving Quadratic Equations Using Square Roots (Week #8)

x²=25

• x = 5
• x = -5
• x = ±25
• x = ±5

Tags

CCSS.8.EE.A.2

x²−10=19

• x = √29
• x = ±2√9
• x = ±29
• x = ±5√19

Tags

CCSS.8.EE.A.2

3x²+12=39

• x = √27
• x = ±3√27
• x = ±3
• x = ±9

Tags

CCSS.8.EE.A.2

(x + 3)² = 36

• x = √36
• x = √39
• x = -9 and x = 3
• x = 9 and x = -3

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

(x - 7)² = 5

• x = 7-√5
• x = 7+√5
• x = √5
• x = 7±√5

Tags

CCSS.HSA-REI.B.4B

Solve x²− 4 = 0

•  2 and -2
• 4 and -4
• 16 and -16
• 8 and -8

Tags

CCSS.HSA-REI.B.4B

Solve by taking square roots:

5m² + 1 = 6

• m = 1

• m = 1 or -1

• m = √7

• m = 7/5 m = -7/5

Tags

CCSS.HSA-REI.B.4B

Solve using square roots.

k² - 6 = 43

• k = √37

• k = 37 or - 37

• k = 7, k = -7

• no real 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 real 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.8.EE.A.2