Quadratic equations

The roots of x2 - 3x + 2 = 0 are:

• 1 3 and 2
• 2 1 and 2
• 3 -1 and -2
• 4 1 and -2

If the roots of a quadratic are real and equal, the discriminant is:

• 1 Negative
• 2 Zero
• 3 Positive
• 4 Undefined

If a and b are roots of x2 - 5x + 6 = 0, then a + b equals:

• 1 -6
• 2 5
• 3 6
• 4 -5

A quadratic with roots 2 and 3 is:

• 1 x2 - x + 6 = 0
• 2 x2 - 5x + 6 = 0
• 3 x2 - 6x + 5 = 0
• 4 x2 + 5x + 6 = 0

The cube roots of unity are 1, w and w2. The value of 1 + w + w2 is:

• 1 -1
• 2 0
• 3 3
• 4 1