Question

a^2-ac+b^2+2ab-bc/ab+ac+b^2-c^2

Answer 1

(a^2+2ab+b^2) -c(a+b) / a(b+c)+(b-c)(b+c) =  (a+b)^2- c (a+b) / a(b+c)+(b-c)(b+c) = (a+b)(a+b-c) / (b+c)(a+b-c) = a+b/b+c