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If (x=-2) and (y=4), what is the value of (x^2y-xy^2)?

Answer and explanation

Correct answer: 48

Given \(x=-2\) and \(y=4\), \(x^2y=(-2)^2\times4=4\times4=16\). Also, \(xy^2=(-2)\times4^2=(-2)\times16=-32\). Therefore, \(x^2y-xy^2=16-(-32)=16+32=48\). The option \(-48\) may result from incorrectly handling the subtraction of a negative number. Exam tip: evaluate powers first, then multiply, and carefully track signs.

Related tags

Algebraic ExpressionsSubstitutionEvaluating ExpressionsInteger OperationsPolynomialsIntroduction To PolynomialsMathematicsClass 9 Mcq

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