9*x - 6*x - 3*x + 2*x
9*x - 6*x - 3*x + 2*x при x = 1/2
9*(1/2) - 6*(1/2) - 3*(1/2) + 2*(1/2)
9/2 - 6/2 - 3/2 + 2/2
1
2*x
2.0*x
11*x - 3*x - 6*x