Nested form evaluate f(x) = x3 – 7.5x2 +11.2x + 2.8 = ((x – 7.5)x + 11.2)x + 2.8 at x = 3.94 using 3S arithmetic and rounding, in both of the given forms. The latter, called the nested form, is usually preferable since it minimizes the number of operations and thus the effect of rounding.