1) 15сх+2су-сху-30с = c(15x+2y-xy-30) = c((15x-30)-(xy-2y)) = c(15(x-2)-y(x-2)) = c(x-2)(15-y)
2) х^3+х^2у+х^2+ху = x(x^2+xy+x+y) = x(x(x+y)+(x+y)) = x(x+y)(x+1)
1) 15сх+2су-сху-30с = c(15x+2y-xy-30) = c((15x-30)-(xy-2y)) = c(15(x-2)-y(x-2)) = c(x-2)(15-y)
2) х^3+х^2у+х^2+ху = x(x^2+xy+x+y) = x(x(x+y)+(x+y)) = x(x+y)(x+1)