Question

How do you evaluate `(- 4+ 4y + 3u ) ( - 9)`?

Answer 1

You expand this bye multiplying each term inside the brackets by the `-9`

Explanation:

`(-4+4y+3u)(-9) = -4 xx (-9) + 4y xx (-9) +3u xx(-9)`

`= 36-36y - 27u`