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Question

If axn+bxn1+c=0 is a quadratic equation, then which of the given options is not correct?

A
a, b and c are real numbers
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B
n = 2
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C
Coefficient 'a' must always be 1
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D
a0
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Solution

The correct option is C Coefficient 'a' must always be 1
The standard form of a quadratic equation in variable x is ax2+bx+c=0, where a, b, c are real numbers and a 0.
Since 'a' can take any real value except 0, the option "Coefficient 'a' must always be 1" is not correct.

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Standard Form of a Quadratic Equation
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