Answer
The student's mistake was that he thought that $x = x^0$. That it not true.
$x = x^1$. The answer should've been $x^{6+1+3} $ or $x^{10}$
Work Step by Step
The student's mistake was that he thought that $x = x^0$. That it not true.
$x = x^1$. The answer should've been $x^{6+1+3} $ or $x^{10}$
