Question

what is the answer in 64-x3y3

Answer 1

You can write the above expression as:
\[4^3 - (xy)^3\]
Use:

\[a^3 - b^3 = (a-b)(a^2 + b^2 + ab)\]

Here, a = 4 and b = xy

Just plug in the values for a and b..