Model hs43 Variables x[1:4] = 0 obj End Variables Equations x[1]^2 +x[2]^2 +x[3]^2 +x[4]^2 +x[1] -x[2] +x[3] -x[4] <= 8 x[1]^2 +2*x[2]^2 +x[3]^2 +2*x[4]^2 -x[1] -x[4] <= 10 2*x[1]^2 +x[2]^2 +x[3]^2 +2*x[1] -x[2] -x[4] <= 5 ! best known objective = -44 ! best known solution ! x[1] = 0 ! x[2] = 1 ! x[3] = 2 ! x[4] = -1 obj = x[1]^2 + x[2]^2 + 2*x[3]^2 + x[4]^2 - 5*x[1] - 5*x[2] - 21*x[3] + 7*x[4] End Equations End Model