Answer Happy

This is Calculus and Linear Algebra math
3. (26 points) Let A = 2 3 -1 0 1 2 1 -1 2 --0---8 0 and x = 3 b = X1 X2 (a) Find the inverse of A by using elementary row operations. (b) Find the determinant of A. (c) Use (a) to solve Ax = b. (d) Use (b) and Cramer's rule to solve Ax = b.