Question Number 73049 by mathmax by abdo last updated on 05/Nov/19
$${simplifyA}_{{n}} =\:\sum_{{k}=\mathrm{0}} ^{{n}} \left(\frac{{k}}{{n}}−\alpha\right)^{\mathrm{2}} \:{C}_{{n}} ^{{k}} \:{X}^{{k}} \left(\mathrm{1}−{X}\right)^{{n}−{k}} \\ $$
simplifyA-n-k-0-n-k-n-2-C-n-k-X-k-1-X-n-k-