Quadratic Equations Complex Numbers

Solve (n+7)(n+9) = 0

• n = -7, n = 4

• n = 7, n = -9

• n = -3, n = 10

• n = -7, n = -9

Solve by factoring: 2x² - 5x - 12 = 0

• x = -4 and x = -6

• x = 4 and x = -3/2

• x = 4 and x = 6

• x = -4 and x = 3/2

Solve by factoring:  2x²+ 7x + 6 = 0

• x= 3/2 and x = 2

• x = -3/2 and x = -2

• x = 6 and x = 7

• x = -6 and x = -7

• 1 real

• 2 real

• 2 imaginary

• 3 real

Solve x² - 5x + 10 = 0

• (5 - i√15)/2  ,  (5 + i√15)/2

• (5 - √15)/2  ,  (5 + √15)/2

• (5 - i√65)/2  ,  (5 + i√65)/2

• (5 - √65)/2  ,  (5 + √65)/2

What is the solution set for the equation x² + 64 = 0

• {-8, 8}

• {-8i, 8i}

• {-16i, 16i}

• {-64i, 64i}

x² - 4 =-68

Hint: do you remember what the square root of -1 =?

Select the solutions to the equation

4x² + 11x + 7 = 0

• x = - 1.75

• x = 6

• x = - 1

• x = 1

Solve
x² + 49 = 0

• -7

• -7

• 7i

• ±7i

Find all solutions to each equation, real or imaginary.

• 2, -2

• 2

• -2

• 2i, -2i