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Which expression is obtained by adding (-x^2+6x-9) to (3x^2-2x+5)?

Answer and explanation

Correct answer: \(2x^2+4x-4\)

Combine like terms while adding: \(3x^2-x^2=2x^2\), \(-2x+6x=4x\), and \(5-9=-4\). Hence, the resulting expression is \(2x^2+4x-4\). In option D, the coefficients of the \(x^2\) terms have been added incorrectly. Exam tip: add the \(x^2\), \(x\), and constant terms separately.

Related tags

PolynomialsAlgebraic ExpressionsAddition Of PolynomialsLike TermsClass 9 MathematicsIntroduction To PolynomialsMathematicsClass 9 Mcq

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