2bc / (2b + c)^2
Пошаговое объяснение:
2b / (2b + c) - 4b^2 / (4b^2 + 4bc + c^2) =
2b / (2b + c) - 4b^2 / (2b + c)^2 =
(2b(2b + c) - 4b^2 ) / (2b + c)^2 =
(4b^2 + 2bc - 4b^2) / (2b + c)^2=
2bc / (2b + c)^2
Пошаговое объяснение:
2b / (2b + c) - 4b^2 / (4b^2 + 4bc + c^2) =
2b / (2b + c) - 4b^2 / (2b + c)^2 =
(2b(2b + c) - 4b^2 ) / (2b + c)^2 =
(4b^2 + 2bc - 4b^2) / (2b + c)^2=
2bc / (2b + c)^2