Question

Упростите выражения: 1)5mn-7mn+3mn-m;
2) mn-3mnk+4mn;
3) 2ab-ab+5ab;
4) 7ab-5bc-2ab.
ХЕЛП!!! ​

Answer 1

1)5mn-7mn+3m-m=-2mn+2m=2m(-n+1) 2)mn-3mnk+4mn=5mn-3mnk=mn(5-3k) 3)2ab-ab+5ab=6ab 4)7ab-5bc-2ab=5ab-5bc=5b(a-c)