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Which expression is obtained by adding (-x^2+5xy-4y^2) to (2x^2-3xy+y^2)?

Answer and explanation

Correct answer: \(x^2+2xy-3y^2\)

Add the like terms in the two polynomials: \(2x^2-x^2=x^2\), \(-3xy+5xy=2xy\), and \(y^2-4y^2=-3y^2\). Therefore, the resulting expression is \(x^2+2xy-3y^2\). Option D incorrectly combines the \(y^2\) terms. Exam tip: while adding polynomials, combine only terms with the same variables raised to the same powers.

Related tags

Polynomial AdditionAlgebraic ExpressionsLike TermsTwo Variable PolynomialsClass 9 MathematicsIntroduction To PolynomialsMathematicsClass 9 Mcq

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