Chapter4: Systems Of Linear Equations
Section4.6: Solve Systems Of Equations Using Determinants
Problem 4.104TI: Determine whether the points (4,1),(6,2) and (2,4) are collinear.
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Quadrilateral ABCD has vertices A (1, -1), B (7, 1), C (8, -2) and D (2, -4). Determine whether ABCD is a rectangle. Explain.
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