Question

which expression is equivalent to 2x powered to n. x 2x powered to n

Answer 1

We have that:

$2x^n\cdot2x^n\rightarrow(2x^n)^2\rightarrow2^2\cdot(x^n)^2\rightarrow4x^{2n}$

This way,

$2x^n\cdot2x^n=4x^{2n}$