( (a+b+c)2-\(a^2+b^2+c^2\) ) का सरल रूप क्या है?
What is the simplified form of ( (a+b+c)2-\(a^2+b^2+c^2\) )?
Explanation opens after your attempt
B. (2ab+2bc+2ca)
Concept
After removing square terms from the three-term square, (2ab+2bc+2ca) remains. Exam tip: remember pairwise terms.
Why this answer is correct
The correct answer is B. (2ab+2bc+2ca). After removing square terms from the three-term square, (2ab+2bc+2ca) remains. Exam tip: remember pairwise terms.
Exam Tip
तीन पदों के वर्ग से वर्ग पद हटाने पर (2ab+2bc+2ca) बचता है। परीक्षा में जोड़ीदार पद याद रखें।
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