a)Ta có: \(C\in Z\Rightarrow3-2x⋮x+2\)
\(\Rightarrow-2x+3⋮x+2\)
\(\Rightarrow\left(-2x-4\right)+7⋮x+2\)
\(\Rightarrow-2\left(x+2\right)+7⋮x+2\)
\(\Rightarrow7⋮x+2\)
\(\Rightarrow x+2\in\left\{1;-1;7;-7\right\}\)
\(\Rightarrow x\in\left\{-1;-3;5;-9\right\}\)
Vậy \(x\in\left\{-1;-3;5;-9\right\}\)
d) sai đề