( (7+3)2 ) को सर्वसमिका से निकालने पर कौन सा रूप सही है?
Using identity, which form is correct for ( (7+3)2 )?
Explanation opens after your attempt
Correct Answer
B. \(7^2+2\cdot7\cdot3+3^2\)
Concept
In the plus square identity, (+2ab) appears. Exam tip: keep ( (a+b)2 ) and ( (a-b)2 ) separate.
Why this answer is correct
The correct answer is B. \(7^2+2\cdot7\cdot3+3^2\). In the plus square identity, (+2ab) appears. Exam tip: keep ( (a+b)2 ) and ( (a-b)2 ) separate.
Exam Tip
जोड़ वाली वर्ग सर्वसमिका में (+2ab) आता है। परीक्षा में ( (a+b)2 ) और ( (a-b)2 ) अलग रखें।
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