Solving Quadratics by Square Roots and Factoring

Solve.

x²=9

• x = ±9

• x = ± 3

• x = 0

• x = ± √3

Solve.

x² - x - 90 = 0

• x = 9, x = 10

• x = 9, x = -10

• No Real Number Solutions

• x = -9, x = 10

Solve.

(x+10)(x-2) = 0

• x= 10 and 2

• x= -2 and 10

• x= -10 and 2

• x= -2 and -10

Solve.

(x - 2)(3x + 1) = 0

• x=2 and -1

• x= -2 and 1

• x= 2 and -3

• x=2 and -1/3

Solve.

z² - 6z = 27

• z = 3 or z = 9

• z = 3 or z = -9

• z = -3 or z = 9

• z = -3 or z = -9

Solve.

2x² = 3x + 2

• x = 1, x = -1

• x = -1/2, x = 2

• x = 1/2, x = 2

• x = 1/2, x = 1

Solve.

x² + 3x - 4 = 0

• x = 2, x = 2

• x = 1, x = 4

• x = 1, x = -4

• No Real Number Solutions

Solve.

4m² - 100 = 0

• m= ±25

• m=96

• m= ±5

• No Real Number Solution

Choose the best method to solve this quadratic:

​ (a)  

3x² - 21 = 3

• Square Roots

• ZPP

• Quadratic Formula

Choose the best method to solve this quadratic:

​ (a)  

2(x + 2)² - 5 = 8

• Square Roots

• Quadratic Formula

• ZPP