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What is the coefficient of (a) in ( (3a-2)(3a+8) )?( (3a-2)(3a+8) ) में (a) का गुणांक क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 1818
Expand the expression: \((3a-2)(3a+8)=9a^2+24a-6a-16=9a^2+18a-16\). Therefore, the coefficient of \(a\) is \(18\). The value \(24\) comes only from \(3a\times 8\); the term \(-2\times 3a=-6a\) must also be included. Exam tip: write all four products before combining like terms.व्यंजक का विस्तार करें: \((3a-2)(3a+8)=9a^2+24a-6a-16=9a^2+18a-16\)। अतः \(a\) का गुणांक \(18\) है। \(24\) केवल \(3a\times 8\) से प्राप्त होता है; \(-2\times 3a=-6a\) को जोड़ना भी आवश्यक है। परीक्षा टिप: रैखिक पदों को मिलाने से पहले सभी चार गुणनफल लिख लें।
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