Question

a^2+b^2-c^2+2ab/a^2-b^2+c^2+2ac
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Answer 1

a²+b²-c²+2ab / a²-b²+c²+2ac=

=a²+2ab+b²-c² / a²+2ac+c²-b²=

=(a+b)²-c² / (a+c)²-b²=

=(a+b-c)*(a+b+c) / (a+c-b)*(a+c+b)=

=a+b-c / a+c-b