Answer
2
Work Step by Step
You have to determine the x value in $a^{6}$+$a^{x}$=$a^{8}$.Solve:
$a^{6+x}$=$a^{8}$ -in order to multiply powers with the same base add the exponents-
6+x=8 -subtract 6 from both sides-
x=2
The x value is 2 so $a^{6}$+$a^{2}$=$a^{8}$
