एक (a+b+c) भुजा वाले वर्ग के दृश्य विस्तार में \(a^2\) \(b^2\) \(c^2\) के साथ कौन से आयत पद आएंगे?
In the visual expansion of a square with side (a+b+c) which rectangle terms appear along with \(a^2\) \(b^2\) and \(c^2\)?
Explanation opens after your attempt
B. (2ab+2bc+2ca)
Concept
Two equal rectangles are formed for each pair so (2ab+2bc+2ca) appears. Exam tip: count pairwise rectangles in a three-part square.
Why this answer is correct
The correct answer is B. (2ab+2bc+2ca). Two equal rectangles are formed for each pair so (2ab+2bc+2ca) appears. Exam tip: count pairwise rectangles in a three-part square.
Exam Tip
हर जोड़ी के दो समान आयत बनते हैं इसलिए (2ab+2bc+2ca) आता है। परीक्षा में तीन भागों वाले वर्ग में जोड़ीदार आयत गिनें।
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