What is the simplified form of (5r+2r-r)?
Answer and explanation
Correct answer: 6r
Here, 5r, 2r, and -r are like terms, so their coefficients are combined: 5+2-1=6. Therefore, the simplified expression is 6r. The option 6r^2 is incorrect because adding like terms does not change the exponent of r. Exam tip: Add or subtract only terms with the same variable and the same exponent.
Frequently asked questions
What is the correct answer to this question?
6r
Why is this the correct answer?
Here, 5r, 2r, and -r are like terms, so their coefficients are combined: 5+2-1=6. Therefore, the simplified expression is 6r. The option 6r^2 is incorrect because adding like terms does not change the exponent of r. Exam tip: Add or subtract only terms with the same variable and the same exponent.
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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