Question

Help please anyone .....

Answer 1

D:
`\begin{pmatrix}10&-5\\ -4&7\end{pmatrix}`

Explanation:

`\begin{pmatrix}5&0\\ 3&-5\end{pmatrix}\begin{pmatrix}2&-1\\ 2&-2\end{pmatrix}`

`\begin{pmatrix}5\cdot \:2+0\cdot \:2&5\left(-1\right)+0\cdot \left(-2\right)\\ 3\cdot \:2+\left(-5\right)\cdot \:2&3\left(-1\right)+\left(-5\right)\left(-2\right)\end{pmatrix}`

`\begin{pmatrix}10&-5\\ -4&7\end{pmatrix}`

Answer 2

I personally don’t know

Explanation:

LOOK IN YOUR NOTES