((5x-2)2) में (x) का गुणांक क्या होगा?
What will be the coefficient of (x) in ((5x-2)2)?
Explanation opens after your attempt
B. (-20)
Concept
The middle term is \(-2\cdot5x\cdot2=-20x\). Exam tip: note both the negative sign and (2ab).
Why this answer is correct
The correct answer is B. (-20). The middle term is \(-2\cdot5x\cdot2=-20x\). Exam tip: note both the negative sign and (2ab).
Exam Tip
मध्य पद \(-2\cdot5x\cdot2=-20x\) है। परीक्षा में ऋण चिह्न और (2ab) दोनों ध्यान रखें।
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