x + y = 3, xy =2 হলে, x3+y3 এর মান কত?
A
9
B
18
C
19
D
27
Correct Answer: 9
x3 + y3 = (x + y)^3 - 3xy*(x + y) = (3)^3 - 3*2*3 = 27 - 18 = 9