Solve Quads w/ Sq Roots & Complex Numbers

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

• x = -4, 2

• x = -2, 4

• x = -16

• x = -4

Solve.

n² - 2n = 0

• n = 2, 0

• n = -2, 0

• n = 2

• n = 0

Factor and solve:

k²+7x+10

• (k+2)(k+5)

  k = -2, -5

• (k-2)(k-5)

  k = 2, 5

• (k+10)(k+4)

  k = -10, -4

• (k+2)(k-5)

  k = -2, 5

Factor and solve:

3x² - 6x - 24

• 3(x - 2)(x + 4)
  x = 2, -4

• 3(x + 2)(x - 4)
  x = -2, 4

Factor and solve:

x²-16

• (x+4)²

  x = -4

• (x-4)²

  x = 4

• (x-16)(x+16)

  x = 16, -16

• (x-4)(x+4)

  x = 4, -4

The "answers" when solving quadratics can be called: (mark all that apply)

• Roots

• Solutions

• Zeros

• X-intercepts