Question 183953
4/z-2 - z+6/z+1 = 1
4(z+1)-(z+6)(z-2)=(z+1)(z-2)
4z+4-(z^2+4z-12)=z^2-z-2
4z+4-z^2-4z+12=z^2-z-2
-z^2+16=z^2-z-2
-2z^2+z+18=0
z=(1-sqrt(145))/4, z=(1+sqrt(145))/4
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Ed
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*[invoke solve_quadratic_equation -2, 1, 18]