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What is obtained after simplifying (6x^2-7xy+3y^2+2xy-5y^2-4x^2)?

Answer and explanation

Correct answer: \(2x^2-5xy-2y^2\)

Combine like terms: \(6x^2-4x^2=2x^2\), \(-7xy+2xy=-5xy\), and \(3y^2-5y^2=-2y^2\). Therefore, the simplified expression is \(2x^2-5xy-2y^2\). Option D has the correct \(xy\) coefficient but the wrong sign for the \(y^2\) term. Exam tip: add or subtract only terms with the same variables raised to the same powers.

Related tags

Algebraic ExpressionsPolynomialsLike TermsSimplificationCoefficientsIntroduction To PolynomialsMathematicsClass 9 Mcq

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