भुजा (a+2b) वाले वर्ग का क्षेत्रफल मॉडल कौन सा विस्तार देता है?
Which expansion is given by the area model of a square with side (a+2b)?
Explanation opens after your attempt
Correct Answer
C. \(a^2+4ab+4b^2\)
Concept
In ((a+2b)2), the middle term is \(2\cdot a\cdot 2b=4ab\). Exam tip: write the square of the second term as \(4b^2\).
Why this answer is correct
The correct answer is C. \(a^2+4ab+4b^2\). In ((a+2b)2), the middle term is \(2\cdot a\cdot 2b=4ab\). Exam tip: write the square of the second term as \(4b^2\).
Exam Tip
((a+2b)2) में बीच का पद \(2\cdot a\cdot 2b=4ab\) है। परीक्षा में दूसरे पद का वर्ग \(4b^2\) लिखें।
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