एक (y+5) भुजा वाले वर्ग में मध्य वर्ग \(y^2\) है। शेष दो समान पट्टियाँ और कोना मिलाकर पहचान चुनिए।
In a square of side (y+5), the middle square is \(y^2\). Choose the identity using the two equal strips and corner.
Explanation opens after your attempt
A. ( (y+5)2=y-2+10y+25 )
Concept
The two strips are (5y+5y), so (10y) appears. In exams, keep the small square area as (25).
Why this answer is correct
The correct answer is A. ( (y+5)2=y-2+10y+25 ). The two strips are (5y+5y), so (10y) appears. In exams, keep the small square area as (25).
Exam Tip
दो पट्टियाँ (5y+5y) हैं इसलिए (10y) आता है। परीक्षा में छोटे वर्ग का क्षेत्रफल (25) रखें।
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