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উৎপাদকে বিশ্লেষণ কর: $a^3+3a+36$

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ধরি, $f(a)=a^3+3a+36$

তাহলে,
$f(-3)=(-3)^3+3(-3)+36$

$=-27-9+36$

$=0$

অর্থাৎ $a=-3$ হলে, প্রদত্ত রাশির মান শূন্য ($0$) হয়।
$a=-3$
বা, $a+3=0$

অর্থাৎ $(a+3)$, $f(a)$ এর একটি উৎপাদক।

এখন,
$a^3+3a+36$

$=a^3+3a^2-3a^2-9a+12a+36$

$=a^2(a+3)-3a(a+3)+12(a+3)$

$=(a+3)(a^2-3a+12)$ [Answer]

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