Quadratics Mixed Practice

Solve by using the square root method:

• No Solution

• x = 3, -3

• x = -21, 21

• x = 7, -7

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

Solve by factoring:

x² + 15x + 44 = 0

• {-8, 2}

• {-7, 5}

• {-11, -4}

• {-11}

Solve by factoring:

(x-11)(5x+1) = 0

• x = 11 or x = -1/5

• x = -11 or x = -1/5

• x = 11 or x = 1/5

• x = -11 or x = 1/5

What are the solutions?

• 0 and 8

• -2 and -4

• 3 and -1

• 2 and 4

Solve by graphing.

2x² + 17x + 21 = 0

• x= ^-21/₂, -17

• x= ²/₃, 16

• x=-7, ^-3/₂

• x=15, -³/₇

Solve by graphing.

3x² + 4x – 20 = 0?

• 0 and -20

• 3.33 and -2

• -3.33 and 2

• -0.67 and -21.33

Solve by graphing.

3 = 2x² - x

• 1 and 1.5

• -1 and 1.5

• -1 and -1.5

• 1 and -1.5

Solve by graphing. 

8 = x² - 7x

• 1 and 4

• -1 and 5

• -1 and 8

• 1 and -7