a + b = c হলে a+b+3abc - এর মান কত ?

A a

B b

C c

D - d

Solution

Correct Answer: Option C

দেওয়া আছে , a+b = c 

       a+b+3abc = (a+b)- 3ab(a+b)+3abc  = c-3abc+3abc  (a+b = c বসিয়ে ) = c3    

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