Answer
0.02x$^3$+0.03x$^2$+1.05x
Work Step by Step
Distribute the negative to the parentheses and then combine like terms vertically.
$\quad0.04x^3-0.03x^2+0.05x$
$\underline{-(0.02x^3-0.06x^2-\quad x)}$
$\qquad\qquad\quad\downarrow$
$\quad0.04x^3-0.03x^2+0.05x$
$\underline{-\;0.02x^3+0.06x^2+\quad x}$
$\quad0.02x^3+0.03x^2+1.05x$
