x-10y³/2y + 5y² При х = -19,у = 4,5

x-10y³ +5y²/2y = x-10y³ +5y/2 = x-10y³ + 2,5у = x-10y(y²+0,25) = -18-45(4,5^2+0,25)= -18-45(20,25+0,25)=-18-45*20,5=-18-922,5=-940,5