Solving Quadratics

Voodoo

100

Use Voodoo Method to find x for:

2x² + 7x + 3 = 0

x = -1/2

x = -3

200

Use Voodoo Method to find x for:

2x² + 5x - 3 = 0

x = 1/2

x = -3

300

Use Voodoo Method to find x for:

3x² + 7x - 6 = 0

x = 2/3

x = -3

400

Use Voodoo Method to find x for:

8x² - 2x - 15 = 0

x = 3/2

x = -5/4

500

Use Voodoo Method to find x for:

3x² - 14x - 5 = 0

x = -1/3

x = 5

Quadratic formula

100

Use Quadratic Formula to find x for:

x² + 5x + 1 = 0

x = (-5 + root (21)) / 2

x = (-5 - root (21)) / 2

200

Use Quadratic Formula to find x for:

2x² - 7x + 4 = 0

x = (7 + root (17)) / 4

x = (7 - root (17)) / 4

300

Use Quadratic Formula to find x for:

3x² + 2x - 7 = 0

x = (-1 + root (22)) / 3

x = (-1 - root (22)) / 3

400

Use Quadratic formula to find x for:

5x² - 6x + 8 = 0

x = (3 + root i(31)) / 5

x = (3 - root i(31)) / 5

500

Use Quadratic formula to find x for:

7x² + 4x - 9 = 0

x = (-2 + root 2(67)) / 7

x = (-2 - root 2(67)) / 7

Completing the square

100

Use Completing the Square to find x for:

x² + 6x - 7 = 0

x = 1

x = -7

200

Use Completing the Square to find x for:

x² - 10x + 13 = 0

x = 5 + (root 2(3))

x = 5 - (root 2(3))

300

Use Completing the Square to find x for:

x² + 8x + 5 = 0

x = -4 + (root (11))

x = -4 - (root (11))

400

Use Completing the Square to find x for:

2x² + 12x - 5 = 0

x = -3 + (root (46)) / 2

x = -3 - (root (46)) / 2

500

Use Completing the Square to find x for:

3x² - 18x + 7 = 0

x = 3 + (root 2(15)) / 3

x = 3 - (root 2(15)) / 3

Square root

100

Use Square Root Method to find x for:

x² = 49

x = 7

x = -7

200

Use Square Root Method to find x for:

(x - 3)² = 16

x = 7

x = -1

300

Use Square Root Method to find x for:

2(x + 1)² = 18

x = 2

x = -4

400

Use Square Root Method to find x for:

(x - 5)² + 7 = 23

x = 9

x = 1

500

Use Square Root Method to find x for:

3(x + 2)² - 12 = 15

x = 1

x = -5

Factoring

100

Use Factoring to find x for:

x² + 9x + 20 = 0

x = -4

x = -5

200

Use Factoring to find x for:

x² - 5x - 24 = 0

x = 8

x = -3

300

Use Factoring to find x for:

2x² + 7x + 3 = 0

x = - 1/2

x = -3

400

Use Factoring to find x for:

3x² - 11x - 4 = 0

x = 4

x = - 1/3

500

Use Factoring to find x for:

4x² + 4x - 15 = 0

x = 3/2

x = - 5/2