( (x+y)2-\(x^2+y^2\) ) किसके बराबर है?
What is ( (x+y)2-\(x^2+y^2\) ) equal to?
Explanation opens after your attempt
B. (2xy)
Concept
( (x+y)2=x-2+2xy+y-2 ), so subtracting \(x^2+y^2\) leaves (2xy). Exam tip: identify the middle term.
Why this answer is correct
The correct answer is B. (2xy). ( (x+y)2=x-2+2xy+y-2 ), so subtracting \(x^2+y^2\) leaves (2xy). Exam tip: identify the middle term.
Exam Tip
( (x+y)2=x-2+2xy+y-2 ) है इसलिए \(x^2+y^2\) घटाने पर (2xy) बचता है। परीक्षा में मध्य पद पहचानें।
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