Q. 25.0( 2 Votes )

Which of the following is a quadratic equation?
A. (x2 + 1) = (2 – x)2 + 3

B. x3 – x2 = (x – 1)3

C. 2x2 + 3 = (5 + x)(2x – 3)

D. none of these

Answer :

A. using

This is not of the form hence it is not quadratic equation.

B. using

This is of the form i.e. of degree 2 (a ≠ 0, a, b, c are real numbers)

Hence this is a quadratic equation.

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