\(3x^2-5xy+2y^2-7x^2+xy-y^2\) को सरल करने पर क्या मिलेगा?
What is obtained after simplifying \(3x^2-5xy+2y^2-7x^2+xy-y^2\)?
Explanation opens after your attempt
A. \(-4x^2-4xy+y^2\)
Concept
\(3x^2-7x^2=-4x^2\), (-5xy+xy=-4xy), and \(2y^2-y^2=y^2\).
Why this answer is correct
The correct answer is A. \(-4x^2-4xy+y^2\). \(3x^2-7x^2=-4x^2\), (-5xy+xy=-4xy), and \(2y^2-y^2=y^2\).
Exam Tip
\(3x^2-7x^2=-4x^2\), (-5xy+xy=-4xy), और \(2y^2-y^2=y^2\)।
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