Question

9m(4m – 3n) – (5m – n)2

A 11m2
– 17 mn – n2
B 11m2
– 37 mn + n2

C 34m2
– 17 mn – n2
D 34m2
– 37 mn + n2​

Answer 1

`36m {}^(2) - 27mn - 10m + 2n`

Explanation:

Use distributive law.

Work with one bracket at a time.

Watch out for the signs!