Question

2ab - a square - b square + 1​

Answer 1

Step-by-step explanation:

2ab-(a)^2-b^2+1

=-(-2ab+a^2+b^2)+1

= -(a-b)^2+1

= 1-(a-b)^2

=(1)^2-(a-b)^2

=(1-a+b)(1+a-b)