Solving Quadratics Using Square Roots

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:
5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no solution

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

(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

2x²= 30

• x= √5

• x= √30

• x= √15

• x= ±5

Tags

CCSS.8.EE.A.2

x²=25

• x = 5

• x = -5

• x = ±25

• x = ±5

Tags

CCSS.8.EE.A.2

2x²=100

• x = √25

• x = ±5√2

• x = √100

• 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

(x + 3)² = 36

• x = √36

• x = √39

• x = -9 and x = 3

• x = 9 and x = -3

Tags

CCSS.HSA-REI.B.4B