What is obtained after simplifying (2y^2+5y-7+3y^2-2y)?
Answer and explanation
Correct answer: \(5y^2+3y-7\)
Combine like terms: \(2y^2+3y^2=5y^2\) and \(5y-2y=3y\). The constant term \(-7\) remains unchanged. Therefore, the simplified expression is \(5y^2+3y-7\). In option C, the sign of the constant term is incorrect. 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?
\(5y^2+3y-7\)
Why is this the correct answer?
Combine like terms: \(2y^2+3y^2=5y^2\) and \(5y-2y=3y\). The constant term \(-7\) remains unchanged. Therefore, the simplified expression is \(5y^2+3y-7\). In option C, the sign of the constant term is incorrect. 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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
