Question

add the polynomial x³-2x²-9. 5x³+2x+0​

Answer 1

Answer:

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Answer 2

Answer:

Group like terms

$x^3-2x^2-9+5x^3+2x+0\\=x^3+5x^3-2x^2+2x-9+0$

Add/subtract like terms

$=6x^3-2x^2+2x-9$