( (a+b+c)2-\(a^2+b^2+c^2\) ) का मान क्या है?
What is the value of ( (a+b+c)2-\(a^2+b^2+c^2\) )?
Explanation opens after your attempt
B. (2ab+2bc+2ca)
Concept
In the square of three terms, the extra mixed terms are (2ab+2bc+2ca). Exam tip: remember all three pairs.
Why this answer is correct
The correct answer is B. (2ab+2bc+2ca). In the square of three terms, the extra mixed terms are (2ab+2bc+2ca). Exam tip: remember all three pairs.
Exam Tip
तीन पदों के वर्ग में अतिरिक्त मिश्र पद (2ab+2bc+2ca) होते हैं। परीक्षा में सभी तीन जोड़े याद रखें।
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