x = 15 ও y = 5 হলে x3-3x2y+3xy2-y3 = কত?

A 800

B 1200

C 1400

D 1000

Solution

Correct Answer: Option D

দেওয়া আছে, x=15,y=5
x3-3x2y+3xy2-y3 = (x-y)3
=(15-5)3
=103
=1000

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