3.1 Review Day

When the equation has an x squared but not just an x, how should you solve it?

• Roots

• Factoring

Tags

CCSS.HSA-REI.B.4B

x² = 16

• 8

• +4, -4

• +16, -16

• 32

Tags

CCSS.8.EE.A.2

-5x² = -500

• no solution

• +25, -25

• +100, -100

• +10, -10

Tags

CCSS.8.EE.A.2

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

Solve
4m² - 100 = 0

• m=25, -25
• m=96
• m=5, -5
• m=-96

Tags

CCSS.8.EE.A.2

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

2x² + 1 = 163

• + 81, -81

• +162, -162

• +9, -9

• no solution

Tags

CCSS.8.EE.A.2

When an equation has an x squared and an x, how should you solve it?

• Roots

• Factoring

Tags

CCSS.HSA-REI.B.4B

Factor the polynomial: 
x² + 7x - 18

• (x + 2)(x - 9)
• (x - 6)(x + 3)
• (x - 2)(x + 9)
• (x + 6)(x + 3)

Factor:
x² + 5x - 24

• (x - 8)(x + 3)
• (x + 8)(x - 3)
• (x + 6)(x - 4)
• (x + 12)(x - 2)