Answer
$x^{15}$
Work Step by Step
We are given the expression $x^{7}\times x^{8}$.
We can use the product rule to simplify, which holds that $a^{m}\times a^{n}=a^{m+n}$ (where a is a real number, and m and n are positive integers).
$x^{7}\times x^{8}=x^{7+8}=x^{15}$
