Объяснение:
1. 21n+6mn-10m-35=3n(2m+7)-5(2m+7)=(2m+7)(3n-5)
2.35mn-42mt+20n-24t=5n(7m+4)-6t(7m+4)=
(7m+4)(5n-6t)
Объяснение:
1. 21n+6mn-10m-35=3n(2m+7)-5(2m+7)=(2m+7)(3n-5)
2.35mn-42mt+20n-24t=5n(7m+4)-6t(7m+4)=
(7m+4)(5n-6t)