Question: Let Ax = b be a system of n linear equations in n unknowns and suppose that x1 and x2 are both solutions and x1

Let Ax = b be a system of n linear equations in n unknowns and suppose that x1 and x2 are both solutions and x1 ≠ x2.
(a) How many solutions will the system have? Explain.
(b) Is the matrix A nonsingular? Explain.

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