Algebra 1: Unit 6 Level 2 Practice

x² = 25

• 5, -5

• 5

• 25, -25

• 12.5, -12.5

Tags

CCSS.8.EE.A.2

3x² = 27

• 3, -3

• 9, -9

• 3

• 4, -4

Tags

CCSS.8.EE.A.2

2x² + 5 = 167

• 9, -9

• 81, -81

• 9.27, -9.27

• 18, -18

Tags

CCSS.8.EE.A.2

2x² + 3 = 35

• 4, -4

• 8, -8

• 16, -16

• 4

Tags

CCSS.8.EE.A.2

Solve by factoring:  2x²+ 7x + 6 = 0

• x= 3/2 and x = 2
• x = -3/2 and x = -2
• x = 6 and x = 7
• x = -6 and x = -7

Solve by factoring:3x² + 5x + 2 = 0  

• x = -2/3 and x = -1
• x = -3/2 and x = -1
• x = 2/3 and x = 1
• x = 2/3 and x = -1

Solve by factoring: x² - 9x + 20 = 0

• x = -4 and x = -5
• x = 20 and x = -9
• x = 4 and x = 5
• x = -4 and x = 5

Solve by factoring: x² + 3x - 18 = 0

• x = -3 and x = 6
• x = 3 and x = -6
• x = -9 and x = 2
• x = 9 and x = -2

What is the first step in solving 
(x + 2)(x - 3) = 0      ?

• Plug in zero for x
• Solve for x
• FOIL
• Set each binomial factor equal to zero

Solve for the values of x:
(2x - 1)(x + 4) = 0

• { 1/2, -4 }
•  { 1/2, 4 }
• { 2, -4 }
• { -2, 4 }