Question

Can you please help me????

Answer 1

see explanation

Explanation:

4G - 6H

= 4
`\left[\begin{array}{ccc}1&-7\\7&6\\\end{array}\right]` - 6
`\left[\begin{array}{ccc}1&1\\-3&7\\\end{array}\right]` ← multiply each component by the scalar

=
`\left[\begin{array}{ccc}4&-28\\28&24\\\end{array}\right]` -
`\left[\begin{array}{ccc}6&6\\-18&42\\\end{array}\right]` ← subtract corresponding components

=
`\left[\begin{array}{ccc}4-6&-28-6\\28-(-18)&24-42\\\end{array}\right]`

=
`\left[\begin{array}{ccc}-2&-34\\46&-18\\\end{array}\right]`