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If a quadratic expression has coefficient 5 for x, coefficient -2 for x², and constant term 7, which is its standard form?

Answer and explanation

Correct answer: \(-2x^2+5x+7\)

The standard form of a quadratic expression is \(ax^2+bx+c\). Here \(a=-2\), \(b=5\), and \(c=7\), so it is \(-2x^2+5x+7\). In option B, the coefficients of x² and x are interchanged. Exam tip: arrange terms as x², x, then constant.

Related tags

Quadratic ExpressionsAlgebraic IdentitiesStandard FormCoefficientsClass 9 MathematicsExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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