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Question

If ax2+bx+c=0 is a quadratic equation, then a CANNOT be:



Your Answer
A

-1

Correct Answer
B

0

Your Answer
C

1

Your Answer
D

pi


Solution

The correct option is D

0


The standard form of any quadratic equation is ax2+bx+c=0, provided a,b,c [coefficients] are real numbers and a≠0 [a is called the leading coefficient]. If a=0, the equation would become bx+c=0 which is then a linear equation, but not a quadratic any more. Hence, the leading coefficient, which is a, should never be 0 in a quadratic equation.

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