Math 8 Algebra Unit 5 Review

Solving Quadratics 1

100

x² + 9x + 20 = 0

What is x = –4, –5?

200

x² + 10 = 40

What is 

x = +-sqrt(30)

300

x² + 6x + 1 = 16

What is 

x = –3 +-2sqrt(6)

400

x² + 20x + 150 = 10

What is "no solution"?

500

x² – 14x – 95 = 6

What is 

x = 7 +- 5sqrt(6)

Solving Quadratics 2

100

x² = 36

What is 6, –6?

200

x² – x – 20 = 10

What is 6, –5?

300

2x² + 18 = 8

What is "no solution"

400

4x² + 48x + 147 = 7

What is –5, –7?

500

3x² + 8x – 16 = 0

What is 

x = -4, 4/3

Solving Quadratics 3

100

x² + 4x – 12 = 0 

What is –6, 2?

200

(x - 4)² = 90

What is 

x = 4+-3sqrt(10)

300

2x² – 16x = 0

What is x = 0, 8?

400

x² + 16x + 51 = 3

What is x = –4, –12?

500

10x² - 17x + 6 = 0

What is 

x = 1/2, 6/5

Quadratic Formula

100

What is the quadratic formula?

x=(-b+-sqrt(b^2-4ac))/(2a)

200

6x² + 9x + 2 = 0

What is 

x = (-9+-sqrt(33))/12

300

x² + 3x + 7 = 0

What is "no solution"?

400

5x² – 4x + 6 = 10

What is 

x=(2+-2sqrt(6))/5

500

12x² - 4x – 20 = –2

What is 

x = (1+-sqrt(55))/6