Question

15fc f-c
----- - ---- subtract and simplify by
f^2-c^2 f+c removing a factor of 1 if possible

Answer 1

i think the simplified answer for this is

\[-( f ^{2}-17fc+c ^{2} )/ (f+c)(f-c)\]

Answer 2

\[(15fc-(f-c)^2)/(f^2-c^2)\]
\[=(15fc-(f^2-2fc+c^2))/(f^2-c^2)\]
\[=(15fc-f^2+2fc-c^2)/(f^2-c^2)\]
\[=(13fc-f^2-c^2)/(f^2-c^2)\]