x+y=7 এবং xy 10 হলে (x-y)^3=?
Created: 3 years ago
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Updated: 2 months ago
We know,
(x-y) ^2=(x+y)^2-4xy
=7^2-4.10
......... =49-40
(x-y) ^2=9
So,x-y =3
Now,
(x-y) ^3=3^3=27
