एक घटाव मॉडल \(16x^2-40xy+25y^2\) दिखाता है। यह किस भुजा वाले वर्ग का क्षेत्रफल है?
A subtraction model shows \(16x^2-40xy+25y^2\). It is the area of a square with which side?
Explanation opens after your attempt
B. (4x-5y)reduced side
Concept
(16x-2=(4x)2), (25y-2=(5y)2), and the middle term is \(-2\cdot4x\cdot5y\). In exams check all three parts of a perfect square.
Why this answer is correct
The correct answer is B. (4x-5y) / reduced side. (16x-2=(4x)2), (25y-2=(5y)2), and the middle term is \(-2\cdot4x\cdot5y\). In exams check all three parts of a perfect square.
Exam Tip
(16x-2=(4x)2), (25y-2=(5y)2), और मध्य पद \(-2\cdot4x\cdot5y\) है। परीक्षा में पूर्ण वर्ग के तीनों भाग जांचें।
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