Python3, Python Matplotlib, Numpy, Differential Calculus, Derivation.
0 ↦ MIN If D < 0 ↦ SADDLE If D = 0 ↦NOT−CONCLUSIVE So the points (-2,1) represents the Minimum (see the graph above) Plotting a polynomial in Geogebra Equations: z = 3x2+2xy+2y+10x+2y+1 Zx = 6x+2y+10=0 ↦ 6x+2y=−10 Zy = 2x+2y+2=0 ↦ 2x+2y=−2 See these Graph in Geogebra and video in Youtube: Please,