एक दृश्य मॉडल में ( (m+n)2 ) और ( (m-n)2 ) दोनों दिखाए गए हैं। इनके क्षेत्रफलों का अंतर क्या होगा?
A visual model shows both ( (m+n)2 ) and ( (m-n)2 ). What will be the difference of their areas?
Explanation opens after your attempt
B. ( 4mn )
Concept
In both expansions, \(m^2\) and \(n^2\) cancel, leaving (2mn-(-2mn)=4mn). In exams, treat minus of minus as addition.
Why this answer is correct
The correct answer is B. ( 4mn ). In both expansions, \(m^2\) and \(n^2\) cancel, leaving (2mn-(-2mn)=4mn). In exams, treat minus of minus as addition.
Exam Tip
दोनों विस्तारों में \(m^2\) और \(n^2\) कटते हैं, (2mn-(-2mn)=4mn) बचता है। परीक्षा में ऋण के ऋण को जोड़ समझें।
Login to save your score, XP, coins and progress.
