Question 1026144

Why does {{{ x^(n-2)*x^1 = x^(n-1) }}}?

please explain
Thanks 
<pre>{{{x^(n - 2) * x^1 = x^(n - 1)}}}
{{{x^(n - 2) * x^1}}} 
{{{x^(n - 2 + 1)}}} ---------- Applying {{{a^b * a^c}}} = {{{a^(b + c)}}}
{{{highlight_green(x^(n - 1))}}}