PARAMETER EQUATION
Metformin peak asymmetry y=23.9-11.87X1+3.61X2+17.65X3-1.04X4-0.93X1X2-4.78X1X3+0.29X1X4
Rosuvastatin peak asymmetry y=-45.69+14.28X1+3.8X2+38.43X3-0.93X4-0.99X1X2-10.22X1X3+0.23X1X4
Metformin peak efficiency y=1474114-376578X1+5651X2-13967X3-7164X4-1456X1X2+3250X1X3+1837X1X
Rosuvastatin peak efficiency y=2223749-560236X1+5697X2-26259X3-10115X4-1484X1X2+5991X1X3+2565X1X4
Resolution of Metformin & Rosuvastatin peaks y=23802-6136X1-27X2-272X3-56.6X4-7.12X1X2+67.32X1X3+22.36X1X4
Table 3: Polynomial equations obtained from factorial design.