(d - 8)*(d + 3) - (d + 6)*(d - 15)
(d - 1*8)*(d + 3) - (d + 6)*(d - 1*15) при d = 1/3
подставляем
66 + 4*d
переменные
d = 1/3
66 + 4*(1/3)
202/3
(-8 + d)*(3 + d) - (-15 + d)*(6 + d)
(3.0 + d)*(-8.0 + d) - (6.0 + d)*(-15.0 + d)
1*(d + 33/2)