(Solved): 8. (10 points) Suppose \[ \mathbf{A}=\left[\begin{array}{rr} 3 & -4 \\ 2 & 5 \end{array}\right], \q ...

8. (10 points) Suppose \[ \mathbf{A}=\left[\begin{array}{rr} 3 & -4 \\ 2 & 5 \end{array}\right], \quad \mathbf{B}=\left[\begin{array}{rr} 0 & 1 \\ -1 & 2 \end{array}\right], \quad \mathbf{x}=\left[\begin{array}{l} x \\ y \end{array}\right] \] a) Compute \( \mathbf{A B}-\mathbf{A} \) b) Compute \( \mathrm{Bx} \)