Solving by Factoring

Solve by factoring.
z² - 6z - 27 = 0

• z = 3 or z = 9

• z = 3 or z = -9

• z = -3 or z = 9

• z = -3 or z = -9

Solve by factoring.
z² - 18z + 81 = 0

• z = 9

• z = -9

• z = 9 or z = -9

Solve:

k² - 2k - 24 = 0

• k = -4, 6

• k = -4, -6

• k = -6, 1

• k = 4, -6

Solve
x² + 9x + 20 = 0

• x = -2, x = -10

• x = -3, x = -4

• x = -4, x = -5

• x = -4, x = -6

Solve
x² + 7x + 12 = 0

• x = -2, x = -10

• x = -3, x = -4

• x = -4, x = -5

• x = -4, x = -6

Solve
x² + 13x + 12 = 0

• x = -1, x = -12

• x = -1, x = -24

• x = -2, x = -6

• x = -2, x = -12

Solve by factoring:

x² - 9x + 20 = 0

• x = -4, -5

• x = 20, -9

• x = 4, 5

• x = -4, 5

Solve by factoring:

x² + 3x - 18 = 0

• x = -3, 6

• x = 3, -6

• x = -9, 2

• x = 9, -2

Solve by factoring:

5x² + 13x + 6 = 0

Factor and solve: 3x² - 6x - 24

• 3(x - 2)(x + 4)
  x = 2, -4

• 3(x + 2)(x - 4)
  x = -2, 4