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Where a, b, and c are constants, which condition is necessary for \(ax^2+bx+c\) to be a quadratic expression in one variable?

Answer and explanation

Correct answer: \(a \ne 0\)

A quadratic expression must have highest power 2, so the coefficient \(a\) of \(x^2\) must be non-zero. If \(a=0\), it becomes \(bx+c\), which is linear or constant. Exam tip: check the coefficient of the highest power first.

Related tags

Quadratic ExpressionsAlgebraic IdentitiesPolynomial DegreeCoefficientsClass 9 MathematicsExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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