alleryA quadratic equation has real coefficients a, b, c with a being:
AExactly zero
BNegative
CPositive
DNon-zero
Answer & Solution
Correct answer: D. Non-zero
1. If a were zero the equation would not be quadratic.
2. The x squared term would disappear.
3. So a must be non-zero.
_Source: syllabus Mathematics, Chapter 5, Complex Numbers and Quadratic Equations._
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