Question

a-b+4ab-4b^2/a-b+ab-b^2=

Answer 1

(a-b+4ab-4b²)/(a-b+ab-b²)=(a-b+4b(a-b))/(a-b+b(a-b))=((a-b)(1+4b))/((a-b)(1+b))=(1+4b)/(1+b)