Question

Can you guys plzzz help. This is precalc. I’m a senior

Answer 1

See below.

Explanation:

Answer 2

1.
`\left[\begin{array}{ccc}-3&-8\\6&3\\2&8\end{array}\right]` , 2.
`\left[\begin{array}{ccc}-8&-4&21\\-8&6&7\end{array}\right]`

Step-by-step explanation

1.
`\left[\begin{array}{ccc}4&-3\\0&-1\\5&8\end{array}\right] - \left[\begin{array}{ccc}7&5\\-6&-4\\3&0\end{array}\right]`

To solve just that each in the first matrix block and substract with their equivalent in the second matrix block.

For example 4 -7 = -3, -3-5= -8

`\left[\begin{array}{ccc}-3&-8\\6&3\\2&8\end{array}\right]`

2.
`-2\left[\begin{array}{ccc}10&2&-3\\1&6&-5\end{array}\right] + 3\left[\begin{array}{ccc}4&0&5\\-2&6&-1\end{array}\right]`

Multiply first block with -2 and the second block by 3

`\left[\begin{array}{ccc}-20&-4&6\\-2&-12&10\end{array}\right] + \left[\begin{array}{ccc}12&0&15\\-6&18&-3\end{array}\right]`

Add just the same as question 1

`\left[\begin{array}{ccc}-8&-4&21\\-8&6&7\end{array}\right]`