Question

решить уравнение 160/(х+3) + 160/(х-3)=26

Answer 1

160(х-3) + 160(х+3)=26(х-3)(х+3)

26x^2-2*160x-26*9=0

D/4=178^2

x=(160+178)/26 = 13

x=(160-178)/26 = -9/13