Question 491705
Combine like terms.


(1.2x^3-1.9x^2+3.3) - (-0.4x^3-2.7x-1.8)

= 1.2x^3 - 1.9x^2 + 3.3 + 0.4x^3 + 2.7x + 1.8


= {{{1.6x^3 - 1.9x^2 + 2.7x + 5.1}}}