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Which option gives the correct difference (-3x^2-8x^2)?

Answer and explanation

Correct answer: \(-11x^2\)

\((-3x^2)-(8x^2)=-3x^2-8x^2\). These are like terms because both have the variable part \(x^2\). Subtracting their coefficients gives \(-3-8=-11\), so the difference is \(-11x^2\). \(-11x^4\) is incorrect because subtraction of like terms does not change the exponent of \(x\). Exam tip: when adding or subtracting like terms, operate only on the coefficients.

Related tags

PolynomialsAlgebraic ExpressionsLike TermsSubtraction Of PolynomialsCoefficientsIntroduction To PolynomialsMathematicsClass 9 Mcq

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