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=>4z+8-5z+5/z^2+z-2=3/z=>13z-z^2=3z^2+3z-6=>0=4z^2-10z-6=>0=2z^2-5z-3=>0=2z^2-6z+z-3=>0=2z(z-3)+(z+3)=>0=(z-3)(2z+1)=>z=3 and z=-1/2(ans)

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