Step-by-step explanation:
No, that is not possible.
The problem lies in that [tex]a=b[/tex].
Looking at your fourth line of work, [tex](a+b)(a-b)=b(a-b)[/tex]
You divided by [tex](a-b)[/tex].
And because [tex]a=b[/tex], [tex]a-b=0[/tex]
This means that when you divided by [tex](a-b)[/tex] you divided by zero, which cannot happen.
