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Riya says that the first and third terms in the expression \(5a^2b-3ab^2+8ab\) are like terms because both contain \(a\) and \(b\). Which statement correctly identifies Riya's error?

Answer and explanation

Correct answer: They are unlike terms because the exponents of \(a\) and \(b\) are not the same.

Like terms must have identical variables with identical exponents. Here, \(5a^2b=a^2b^1\), but \(8ab=a^1b^1\); the power of \(a\) differs. Coefficients may differ in like terms. Exam tip: compare every exponent.

Related tags

Algebraic ExpressionsLike TermsUnlike TermsExponentsPolynomialsClass 9 MathematicsIntroduction To PolynomialsMathematics

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