Question

How to expand 2a²b-ab-a​

Answer 1

`a(2ab - b - 1)`

Explanation:

1) Find the Greatest Common Factor (GCF).

`gcf = a`

2) Factor out the GCF. ( write the GCF first. then, in parentheses, divide each term by the GCF).

`a( \frac{ {2a}^(2)b }{a} + ( - ab)/(a) - (a)/(a)`

3) Simplify each term in parentheses.

`a(2ab - b - 1)`