Question:`x^2 (x^3 - x^2)` রাশিটিতে x এর সূচক সমূহের যোগফল কত ? 

A 3 
B 7 
C 9 
D 10 

+ Answer
C 

+ Explanation
`x^2 (x^3 - x^2) = x^5 - x^4`

:. সূচকদ্বয়ের যোগফল = 5 + 4 = 9

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Irin Moni

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