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Verified Answer :

Neuron

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.

Leader

\((5x^3+3x^2-5x+4)+(8x^3-5x^2+8x+9)=\\\\13x^3-2x^2+3x+13\)

\(\sf\ Answer:\ {\boxed{13x^3-2x^2+3x+13}\)