In (2ab+3ab-4a), which term is not a like term of (ab)?
Answer and explanation
Correct answer: -4a
Like terms must have exactly the same variables raised to the same powers; only their numerical coefficients may differ. In 2ab, 3ab, and 5ab, both a and b have power 1, so they are like ab. However, -4a has no b, so it is not a like term of ab. Exam tip: Compare the variable part and exponents, not the coefficients.
Frequently asked questions
What is the correct answer to this question?
-4a
Why is this the correct answer?
Like terms must have exactly the same variables raised to the same powers; only their numerical coefficients may differ. In 2ab, 3ab, and 5ab, both a and b have power 1, so they are like ab. However, -4a has no b, so it is not a like term of ab. Exam tip: Compare the variable part and exponents, not the coefficients.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Algebraic expressions.
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