एक दृश्य प्रमाण में ( (a+b+c)2-(a+b-c)2 ) को दो वर्गों के अंतर के रूप में पढ़ा गया। शेष क्षेत्रफल क्या होगा?
In a visual proof, ( (a+b+c)2-(a+b-c)2 ) is read as a difference of two squares. What is the remaining area?
Explanation opens after your attempt
Correct Answer
A. (4c(a+b))strip area
Concept
This is ((u+c)2-(u-c)2=4uc) where (u=a+b), so the area is (4c(a+b)). In exams treat the whole group (a+b) as one side.
Why this answer is correct
The correct answer is A. (4c(a+b)) / strip area. This is ((u+c)2-(u-c)2=4uc) where (u=a+b), so the area is (4c(a+b)). In exams treat the whole group (a+b) as one side.
Exam Tip
यह ((u+c)2-(u-c)2=4uc) है जहां (u=a+b), इसलिए क्षेत्रफल (4c(a+b)) है। परीक्षा में पूरे समूह (a+b) को एक भुजा मानें।
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