Consider following NLPP Min Z=2×1^2-24×1+2×2²-8×2+2×3^2-12×3+200 By separating this function show that it is convex

Consider following NLPP Min Z=2×1^2-24×1+2×2²-8×2+2×3^2-12×3+200 By separating this function show that it is convex