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যদি $x^3+hx+10=0$ এর একটি সমাধান $2$ হয়, তবে $h$ এর মান কত?

Options :

  • (A) $10$
  • (B) $9$
  • (C) $-9$
  • (D) $-2$

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প্রশ্নমতে, x=2 হলে h এর মান নির্ণয় করতে হবে।

প্রদত্ত রাশি,
$x^3+hx+10=0$

বা, $2^3+h.2+10=0$

বা, $8+2h+10=0$

বা, $2h+18=0$

বা, $2h=-18$

বা, $h=\frac{-18}{2}$

$\therefore h=-9$

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