( (2x-3)(2x+9) ) में (x) का गुणांक क्या होगा?
What will be the coefficient of (x) in ( (2x-3)(2x+9) )?
Explanation opens after your attempt
A. (12)
Concept
The cross terms are \(2x\cdot9=18x\) and \(-3\cdot2x=-6x\). Total is (12x).
Why this answer is correct
The correct answer is A. (12). The cross terms are \(2x\cdot9=18x\) and \(-3\cdot2x=-6x\). Total is (12x).
Exam Tip
क्रॉस पद \(2x\cdot9=18x\) और \(-3\cdot2x=-6x\) हैं। कुल (12x) है।
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