(5+m)^2=_^2+2_ _+_^2=
(2c-d)^2=_^2-2_ _+_^2=
(3p+4k)^2=_^2+2_ _+_^2=
(6a+_)^2=_^2+2_ _+25x^2=
(_-4x)^2=25y^2-2_ _+_^2=

данил1234758888    3   07.04.2020 20:54    0