एक (10) बाय (10) वर्ग में से (2) चौड़ाई की पट्टियां हटाकर (8) बाय (8) वर्ग दिखाया गया। यह किस संख्यात्मक पहचान को समझाता है?
A (10) by (10) square is reduced by removing strips of width (2) to show an (8) by (8) square. Which numerical identity does it explain?
Explanation opens after your attempt
A. \(8^2=10^2-2\cdot10\cdot2+2^2\)difference square
Concept
Since (8=10-2), this is a model of ((a-b)2). In exams do not forget to add back the overlap in a reduced square.
Why this answer is correct
The correct answer is A. \(8^2=10^2-2\cdot10\cdot2+2^2\) / difference square. Since (8=10-2), this is a model of ((a-b)2). In exams do not forget to add back the overlap in a reduced square.
Exam Tip
(8=10-2) इसलिए यह ((a-b)2) का मॉडल है। परीक्षा में घटे हुए वर्ग में ओवरलैप को जोड़ना न भूलें।
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