यदि ((a+b)2-(a-b)2) को दो वर्गों के दृश्य अंतर से दिखाएं तो बचा क्षेत्रफल क्या होगा?
If ((a+b)2-(a-b)2) is shown as the visual difference of two squares, what remaining area is obtained?
Explanation opens after your attempt
Correct Answer
B. (4ab)four rectangular parts
Concept
Subtracting the two expansions leaves (4ab). In exams the equal \(a^2\) and \(b^2\) terms cancel.
Why this answer is correct
The correct answer is B. (4ab) / four rectangular parts. Subtracting the two expansions leaves (4ab). In exams the equal \(a^2\) and \(b^2\) terms cancel.
Exam Tip
दोनों विस्तार घटाने पर (4ab) बचता है। परीक्षा में समान \(a^2\) और \(b^2\) पद कट जाते हैं।
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