x³-px+10 = 0 এর একটি সমাধান 2 হলে p এর মান কত?

A -2

B -9

C 9

D 10

Solution

Correct Answer: Option C

(2)3  - P.2 + 10 = 0    [x = 2 বসিয়ে ] 

  => 8 - 2P = -10 

 => -2P = -10 - 8 

=>  P = -18/-2 

       P = 9 

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