x*x - 10*x + 36
x*x - 10*x + 36 при x = 3
(3)*(3) - 10*(3) + 36
3*3 - 10*3 + 36
15
2 36 + x - 10*x
36.0 - 10.0*x + x*x
36 + x*(-10 + x)