Answer
$3x^3-6x^2+10x-20+\dfrac{50}{x+2}
$
Work Step by Step
Using the synthetic division method below, then
\begin{array}{l}\require{cancel}
(
3x^4-2x^2+10
)\div(
x+2
)
\\=
3x^3-6x^2+10x-20+\dfrac{50}{x+2}
.\end{array}
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