कौन-सा दृश्य विभाजन \(x^2+xy-20y^2\) को आयत में बदलने के लिए उपयुक्त है?
Which visual partition is suitable for changing \(x^2+xy-20y^2\) into a rectangle?
Explanation opens after your attempt
C. (x+5y) और (x-4y)signed side lengths
Concept
Since (5y+(-4y)=y) and (5y\cdot(-4y)=-20y-2), the sides are (x+5y) and (x-4y). In exams add tiles with signs.
Why this answer is correct
The correct answer is C. (x+5y) और (x-4y) / signed side lengths. Since (5y+(-4y)=y) and (5y\cdot(-4y)=-20y-2), the sides are (x+5y) and (x-4y). In exams add tiles with signs.
Exam Tip
(5y+(-4y)=y) और (5y\cdot(-4y)=-20y-2), इसलिए भुजाएं (x+5y) और (x-4y) हैं। परीक्षा में चिन्ह सहित टाइलों का योग करें।
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