Solve the equation given if we know that 2\displaystyle -{2} is a solution for the equation. Enter all solutions, separated by a comma.

x7+7x6100x4256x3192x2=0\displaystyle {x}^{{7}}+{7}{x}^{{6}}-{100}{x}^{{4}}-{256}{x}^{{3}}-{192}{x}^{{2}}={0}

x=\displaystyle {x}=