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What is obtained after simplifying (3x+2y-x+5y)?
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Answer and explanation
Correct answer: \(2x+7y\)
Combine like terms: \(3x-x=2x\) and \(2y+5y=7y\). Therefore, the simplified expression is \(2x+7y\). \(4x+7y\) is incorrect because the coefficient in \(3x-x\) is \(3-1=2\), not 4. Exam tip: Add or subtract only terms with the same variable and the same power.
Frequently asked questions
What is the correct answer to this question?
\(2x+7y\)
Why is this the correct answer?
Combine like terms: \(3x-x=2x\) and \(2y+5y=7y\). Therefore, the simplified expression is \(2x+7y\). \(4x+7y\) is incorrect because the coefficient in \(3x-x\) is \(3-1=2\), not 4. Exam tip: Add or subtract only terms with the same variable and the same power.
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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