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If (m=3) and (n=-2), what is the value of (m^2n-mn^2)?

Answer and explanation

Correct answer: -30

Substituting m=3 and n=-2, m²n=3²×(-2)=9×(-2)=-18, while mn²=3×(-2)²=3×4=12. Therefore, m²n-mn²=-18-12=-30. Option -6 is not correct because it does not correctly subtract the second term, 12. Exam tip: the square of a negative number is positive, so (-2)²=4.

Related tags

Algebraic ExpressionsSubstitutionInteger OperationsPolynomial EvaluationSign RulesIntroduction To PolynomialsMathematicsClass 9 Mcq

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