Use the two-stage method to solve.Find x1 ? 0 and x2 ? 0 such that2x1 + x2 ? 12x1 + 4x2 ? 36and z = 4x1 + 3x2 is maximized.
A. x2 = 9, x1 = 0, z = 39
B. x1 = 32, x2 = 1, z = 131
C. x1 = 12, x2 = 0, z = 48
D. x1 = 36, x2 = 0, z = 144
Answer: D
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