Question

alguém me ajuda nessas duas pfv
A) (-4a+5b-2ab)+(3a-7b-4ab)

B) (2mn+4m-5n)+(-2mh+5m)-8mn-4n)
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Answer 1

A) (-4a+5b-2ab)+(3a-7b-4ab)=

-4a+5b-2ab+3a-7b-4ab=

(-4+3).a+(5-7).b+(-2-4).ab=

-a-2b-6ab

B) (2mn+4m-5n)+(-2mn+5m)-8mn-4n=

2mn+4m-5n-2mn+5m-8mn-4n=

(2-2-8).mn+(4+5).m+(-5-4).n =

-8mn+9m-9n