Find the sum of (5x3 + 3x2 - 5x + 4) and (8x3 -5x2 + 8x + 9).
If you would like to solve (5 x^3 + 3 x^2 - 5 x + 4) + (8 x^3 - 5 x^2 + 8 x + 9), you can calculate this using the following steps:
(5 x^3 + 3 x^2 - 5 x + 4) + (8 x^3 - 5 x^2 + 8 x + 9) = 5 x^3 + 8 x^3 + 3 x^2 - 5 x^2 - 5 x + 8 x + 4 + 9 = 13 x^3 - 2 x^2 + 3 x + 13
The correct result would be 13 x^3 - 2 x^2 + 3 x + 13.
\((5x^3+3x^2-5x+4)+(8x^3-5x^2+8x+9)=\\\\13x^3-2x^2+3x+13\)
\(\sf\ Answer:\ {\boxed{13x^3-2x^2+3x+13}\)