Answer:
2. [tex]\left[\begin{array}{ccc}1&4\\0&3\\\end{array}\right][/tex]
3. [tex]\left[\begin{array}{ccc}-3&21&60\\-15&9&-45\\\end{array}\right][/tex]
4. [tex]\left[\begin{array}{ccc}6&-14\\-2&-6\\\end{array}\right][/tex]
Step-by-step explanation:
2. This matrix is easy, as it just requires addition.
[tex]\left[\begin{array}{ccc}1&4\\0&3\\\end{array}\right][/tex] + [tex]\left[\begin{array}{ccc}0&0\\0&0\\\end{array}\right][/tex] = [tex]\left[\begin{array}{ccc}1&4\\0&3\\\end{array}\right][/tex]
3. This matrix requires for the matrices to be multiplied first, then added.
[tex]\left[\begin{array}{ccc}9&-15&18\\-27&15&-9\\\end{array}\right][/tex] + [tex]\left[\begin{array}{ccc}-12&36&42 \\12& -6 & -36 \\\end{array}\right][/tex] = [tex]\left[\begin{array}{ccc}-3&21&60\\-15&9&-45\\\end{array}\right][/tex]
4. Here we can add the last 2 matrices to find x.
[tex]\left[\begin{array}{ccc}2&-8\\-4&2\\\end{array}\right][/tex] + [tex]\left[\begin{array}{ccc}4&-6\\2&-8 \\\end{array}\right][/tex] = [tex]\left[\begin{array}{ccc}6&-14\\-2&-6\\\end{array}\right][/tex]
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