а) (х+1)/(х-2) - (х+3)/х = (х(x+1) - (х-2)(х+3))/(х(x-2)) = (х^2 + х - х^2 - 5х + 6)/(х(x-2)) = -4х + 6 / (х(x-2))
б) (2а)/(2а-1) - 1/(2а+1) = (2а(2а+1) - (2а-1))/(2а(2а+1)) = (4а^2 + 2а - 2а + 1)/(2а(2а+1)) = 4а^2 + 1 / (2а(2а+1))
в) р/(3р-1) - р/(1+3р) = (р(1+3р) - р(3р-1))/((3р-1)(1+3р)) = (4р^2)/(3р^2 - р + 3р - 1) = 4р^2 / (3р^2 + 2р - 1)
а) (х+1)/(х-2) - (х+3)/х = (х(x+1) - (х-2)(х+3))/(х(x-2)) = (х^2 + х - х^2 - 5х + 6)/(х(x-2)) = -4х + 6 / (х(x-2))
б) (2а)/(2а-1) - 1/(2а+1) = (2а(2а+1) - (2а-1))/(2а(2а+1)) = (4а^2 + 2а - 2а + 1)/(2а(2а+1)) = 4а^2 + 1 / (2а(2а+1))
в) р/(3р-1) - р/(1+3р) = (р(1+3р) - р(3р-1))/((3р-1)(1+3р)) = (4р^2)/(3р^2 - р + 3р - 1) = 4р^2 / (3р^2 + 2р - 1)