HelloIAmGone
New Member
How do you factorise a^{2}-b^{2}-a+b?
The answers state (a-b)(a+b-1), and whilst trying to work out the question I got up to "(a+b)(a-b)-(a-b)" but have no idea on what to do next... complete mindblank rn x-x
The answers state (a-b)(a+b-1), and whilst trying to work out the question I got up to "(a+b)(a-b)-(a-b)" but have no idea on what to do next... complete mindblank rn x-x