Question

x to the 12th power times z to the 11th power all over x to the 2nd power times z to the 4th power

Answer 1

\[
\frac{x^{12}z^{11}}{x^2z^4}=x^{12}x^{-2}z^{11}z^{-4}=x^{10}z^7
\]

Answer 2

That is true. By the applications of the laws of indices.