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If (x=2) and (y=-4), what is the value of (3x^2-2xy+y)?

Answer and explanation

Correct answer: 24

Substituting the given values,
\(3x^2-2xy+y=3(2)^2-2(2)(-4)+(-4)=12+16-4=24\). Therefore, the correct answer is 24. Note that in
\(-2xy\), using
\(y=-4\) makes the product positive; treating it as
\(-16\) is a common error. In exams, substitute negative values in brackets to track signs correctly.

Related tags

Algebraic ExpressionsPolynomial EvaluationSubstitutionInteger OperationsSign RulesIntroduction To PolynomialsMathematicsClass 9 Mcq

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