1 You are given that matrix \(\mathbf { A } = \left( \begin{array} { r r } 2 & - 1
0 & 3 \end{array} \right)\) and matrix \(\mathbf { B } = \left( \begin{array} { r r } 3 & 1
- 2 & 4 \end{array} \right)\).
- Find BA.
- A plane shape of area 3 square units is transformed using matrix \(\mathbf { A }\). The image is transformed using matrix B. What is the area of the resulting shape?