Find the absolute maximum and minimum values of D(x,y)=x²-xy + y² + 1 On the closed triangular plate in the first quadrant bounded by the lines x = 0, y = 4, y = x.

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Q: 2) Consider the following system: x + by = 9 a₁x +9y = -27 Determine the value(s) for a for which…

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