\(x^2+2xy+y^2\) को (y=3) रखने पर कौन सा द्विघात व्यंजक मिलेगा?
What quadratic expression is obtained from \(x^2+2xy+y^2\) when (y=3)?
Explanation opens after your attempt
C. \(x^2+6x+9\)
Concept
Substituting (y=3) gives (2xy=6x) and \(y^2=9\). Exam tip: replace every (y) by the given value.
Why this answer is correct
The correct answer is C. \(x^2+6x+9\). Substituting (y=3) gives (2xy=6x) and \(y^2=9\). Exam tip: replace every (y) by the given value.
Exam Tip
(y=3) रखने पर (2xy=6x) और \(y^2=9\) मिलता है। परीक्षा में हर (y) को दिए मान से बदलें।
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