Solving Quads

Solve by square roots: 4x² = 81

• ±9

• 9

• ±9/2

• 9/2

Solve by square roots: 5 - 6x² = 113

• ±3i√2

• ±3√2

• 3i√2

• 3√2

Solve by square roots: 10(x - 7)² = 440

• -7 ± 2√11

• 7 ± 2√11

• ± 9√11

• 7 ± 2i√11

Solve by factoring: 2x² + 3x + 1 = 0

• x = 1/2, 1

• x = 1

• x = -1

• x = -1/2, -1

Solve by factoring: 7x² = -28x

• x = 0, -4

• x = -4

• x = 0, 4

• x = 4

Solve by factoring: 8x² - 2x - 18 = -15

• x = 4/3, -1/2

• x = -3/4, 1/2

• x = 6, -4

• x = 3/4, -1/2

Solve by completing the square: x² - 4x - 8 = 0

• x = 2 ± 2√2

• x = 2 ± 2i√3

• x = 2 ± 2√3

• x = 2 ± 2i√2

Solve by completing the square: x² + 2x + 4 = 0

• x = -1 ± i√3

• x = -1 ± √3

• x = -1 ± √3i

• x = -1 ± √-3

Solve by completing the square: 2x² + 6x - 4 = 0

• x = (3 ± √17) / 2

• x = (-3 ± √17) / 2

• x = (-3 + √17) / 2

• x = (3 + √17) / 2

Solve using any method: x² - 12x + 23 = 0

• x = 6 ± √52

• x = 6 ± √13/2

• x = (12 ± 2√13) / 2

• x = 6 ± √13