Let -5 14 A =-6 -3 21 3 +9. (a) Compute det(A) = (b) Use Cramer's rule to solve the following system -5 x1 5 x2 + 14 x3 -1 -6 x1 3 x2 + 21 x3 2 %3D 3 x1 3 x2 9 x3 4 x1 = x2 = x3 = || +

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