Maths A*-A numbers

(2 sqrt50 - 3 sqrt8 )^2. First you could simplify the expression: (2 sqrt{25*2} -3 sqrt{4*2} )^2 = (2 *5 *sqrt{2} -3*2* sqrt{2} )^2 = (10sqrt{2} - 6* sqrt{2} )^2 = (4sqrt(2))^2 = 16*2 = 32