यदि किसी वर्ग मॉडल का क्षेत्रफल \(25x^2-30xy+9y^2\) है, तो उसकी भुजा क्या होगी?
If the area of a square model is \(25x^2-30xy+9y^2\), what is its side?
Explanation opens after your attempt
C. (5x-3y)
Concept
This is the expansion of ((5x-3y)2) because the middle term is (-30xy). Exam tip: identify subtraction in the side from the negative middle term.
Why this answer is correct
The correct answer is C. (5x-3y). This is the expansion of ((5x-3y)2) because the middle term is (-30xy). Exam tip: identify subtraction in the side from the negative middle term.
Exam Tip
यह ((5x-3y)2) का विस्तार है क्योंकि बीच का पद (-30xy) है। परीक्षा में ऋणात्मक मध्य पद से भुजा में घटाव पहचानें।
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