Question

How do you multiply `(a+2b-4ab)(2a-b)`?

Answer 1

`(a+2b−4ab)(2a−b)`

By Binomial Multiplication:

`= 2a(a+2b−4ab)-b (a+2b−4ab)`

`=2a^2+4ab-8a^2b-ab-2b^2+4ab^2`

`=2a^2+4ab-ab-8a^2b-2b^2+4ab^2`

`=2a^2+3ab-8a^2b-2b^2+4ab^2`