(2у-3)в кубе

To find the cube of (2у-3), we can use the formula for cubing binomials, which is:

(a - b)^3 = a^3 - 3a^2b + 3ab^2 - b^3

In this case, a = 2у and b = 3.

So, applying the formula, we have:

(2у-3)^3 = (2у)^3 - 3(2у)^2(3) + 3(2у)(3)^2 - (3)^3

Simplifying this expression, we get:

8у^3 - 36у^2 + 54у - 27

Therefore, the cube of (2у-3) is 8у^3 - 36у^2 + 54у - 27.