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What is the coefficient of (x) in ( (x+4)(x+9) )?( (x+4)(x+9) ) में (x) का गुणांक क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 1313
\((x+4)(x+9)=x^2+9x+4x+36=x^2+13x+36\). Therefore, the coefficient of \(x\) is \(13\). The number \(36\) is the constant term, not the coefficient of \(x\). Exam tip: In \((x+a)(x+b)\), the coefficient of \(x\) is always \(a+b\).\((x+4)(x+9)=x^2+9x+4x+36=x^2+13x+36\)। इसलिए \(x\) का गुणांक \(13\) है। \(36\) स्थिर पद है, इसलिए वह \(x\) का गुणांक नहीं है। परीक्षा टिप: \((x+a)(x+b)\) में \(x\) का गुणांक हमेशा \(a+b\) होता है।
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