Ответ:

1.(a-b+c)*(2m+3n)

Объяснение:

4.(t+k+p)*(11a-9b)

Ответ:

1)2am-2bm+2cm+3an-3bn+3cn= 2m(a-d+c)+3n(a-b+c)= (2m+3n)(a-b+c)

2) 3mx+3nx+3kx-2ny-2my-2ky= 3x(m+n+k)-2y(n+m+k)= (3x-2y)(n+m+k)

3)7tx+7ty+7tz+4kx+4ky+4kz= 7t(x+y+z)+4k(x+y+z)=(7t+4k)(x+y+z)

4)11at+11ak-11ap-9bt-9bk-9pb= 11a(t+k+p)-9b(t+k+p)=(11a-9b)(t+k+p)