Show:
Add/Subtract Complex #'s
|a + bi| & Multiplication
Quadratic Equation Solving
Discriminants
Solving Quadratic
100
Simplify: (3 + 5i) + (3i)
What is 3 + 8i?
100
Simplify: |-6i|
What is 6 ?
100
Solve using the quadratic formula: x^2 - 4x + 3 = 0
What is x = 1 and x = 3 ?
100
Evaluate the discriminant, and tell how many solutions each has and whether they are real or imaginary: x^2 - 4x -5 = 0
What is 36; two real solutions ?
100
Solve the equation: x^2 + 1 = 0
What is x = i and x = -i ?
200
Simplify: (-1 + 2i) + (6 - 3i)
What is 5 - i ?
200
Simplify: |3 + 4i|
What is 5 ?
200
Solve using the quadratic formula: 2x^2 + 7x -15 = 0
What is x = 3/2 and x = -5 ?
200
Evaluate the discriminant, and tell how many solutions each has and whether they are real or imaginary: 2x^2 + 7x - 15 = 0
What is 169; two real solutions ?
200
Solve the equation: x^2 + 36 = 0
What is x = 6i and x = -6i ?
300
Simplify: (8 + 10i) - (5i)
What is 8 + 5i ?
300
Simplify: (-5i)^2
What is -25 ?
300
Solve using the quadratic formula: 4x^2 + 20x +25 = 0
What is x = -5/2 ?
300
Evaluate the discriminant, and tell how many solutions each has and whether they are real or imaginary: 4x^2 + 20x + 25 = 0
What is 0; one real solution?
300
Solve the equation: x^2 = -7
What is x = iV7 and x = -iV7 ?
400
Simplify: (12 + 5i) - (2 - i)
What is 10 + 6i ?
400
Simplify: (3 + 4i)(2 - 6i)
What is 30 - 10i ?
400
Solve using the quadratic formula: x^2 + 4x + 5 = 0
What is x = -2 + i and x = -2 - i ?
400
Evaluate the discriminant, and tell how many solutions each has and whether they are real or imaginary: x^2 + 4x + 5 = 0
What is -4; two imaginary solutions?
400
Solve the equation: 2x^2 + 1 = 0
What is x = iV2 / 2 and x = -iV2 / 2
500
Simplify: -(-7 + 3i) - (5 + 10i)
What is 2 - 13i ?
500
Simplify: (-7 - 6i)^2
What is 13 + 84i ?
500
Solve using the quadratic formula: x^2 - 2x + 3 = 0
What is x = 1 + iV2 and x = 1 - iV2 ?
500
Evaluate the discriminant, and tell how many solutions each has and whether they are real or imaginary: 2x^2 + x + 28 = 0
What is -223; two imaginary solutions?
500
Solve the equation: -5x^2 - 3 = 0
What is x = iV15 / 5 and x = -iV15 / 5 ?