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What is obtained after simplifying (9a^2b-4ab^2-6a^2b+11ab^2)?

Answer and explanation

Correct answer: 3a^2b+7ab^2

Only like terms can be added or subtracted. Here, 9a^2b and -6a^2b are like terms, so they give 3a^2b. Similarly, -4ab^2 and 11ab^2 give 7ab^2. Hence, the simplified expression is 3a^2b+7ab^2. Option A results from adding the coefficients of a^2b incorrectly. Exam tip: Before combining terms, check that both the variables and their exponents are identical.

Related tags

Algebraic ExpressionsLike TermsPolynomialsSimplificationVariablesIntroduction To PolynomialsMathematicsClass 9 Mcq

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