Question

I don’t know this answer help?

Answer 1

see explanation

Explanation:

(a)

AB = b - a =
`\left[\begin{array}{ccc}1\\-3\\\end{array}\right]` -
`\left[\begin{array}{ccc}5\\1\\\end{array}\right]` =
`\left[\begin{array}{ccc}-4\\-4\\\end{array}\right]`

(b)

BA = a - b =
`\left[\begin{array}{ccc}5\\1\\\end{array}\right]` -
`\left[\begin{array}{ccc}1\\-3\\\end{array}\right]` =
`\left[\begin{array}{ccc}4\\4\\\end{array}\right]`

(c)

AC = c- a =
`\left[\begin{array}{ccc}-2\\4\\\end{array}\right]` -
`\left[\begin{array}{ccc}5\\1\\\end{array}\right]` =
`\left[\begin{array}{ccc}-7\\3\\\end{array}\right]`

(d)

CB = b - c =
`\left[\begin{array}{ccc}1\\-3\\\end{array}\right]` -
`\left[\begin{array}{ccc}-2\\4\\\end{array}\right]` =
`\left[\begin{array}{ccc}3\\-7\\\end{array}\right]`