Question

упростите выражение 5mn-7mn+3m-m mn-3mnk+4mn 2ab-ab+5ab 7ab-5abc-2ab

Answer 1

5mn-7mn+3m-m=(5-7)mn+(3-1)m=-2mn+2m=2m(1-n)

mn-3mnk+4mn=mn(1-3n+4)=mn(5-3n)

2ab-ab+5ab=ab(2-1+5)=6ab

7ab-5abc-2ab=2ab(5-3c-1)=2ab(4-3c)