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College math practice test MCQ: for a quadratic equation ax² + bx + c sum of root is with options b/a, −b/a, c/a and none of above for scholars competing for college and universities' scholarships with college board and MCAT practice test. Free study guide is for online learning cube roots of unity quiz questions with MCQs to practice test questions with answers.

MCQ: For a quadratic equation ax² + bx + c sum of root is

1. b/a
2. −b/a
3. c/a
4. None of Above

C

MCQ: If one root of equation x² - 3x + a = 0 is 2, then

1. a = -2
2. a = 2
3. a = 0
4. a = -3

B

MCQ: If ω is imaginary cube root of unity, then ω =

1. 1
2. 0
3. ω-2

C

MCQ: If one root of equation is (- 1 - ι), then other root is

1. 1 - ι
2. 1 + ι
3. −1 - ι
4. None of Above

C

MCQ: Sum of all three cube roots of unity is

1. 1
2. −1
3. 3
4. 0

D