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Riya says that \(5a^2b\) and \(-3ab^2\) are like terms because both contain \(a\) and \(b\). Which statement correctly identifies Riya’s error?

Answer and explanation

Correct answer: The exponents of the variables are not the same in both terms.

Like terms must have the same variables raised to the same respective powers. Here, the powers of \(a\) are 2 and 1, while those of \(b\) are 1 and 2. Their total degree is 3, but they are still unlike terms. Exam tip: compare each variable’s exponent separately.

Related tags

Algebraic ExpressionsLike TermsExponentsPolynomialsClass 9 MathematicsIntroduction To PolynomialsMathematicsClass 9 Mcq

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