Question

me ajudem pfv...............​

Answer 1

Resposta:

a) 6a-15b+6c.

b) 7y²+5a²-4ay.

c) -2a³+5a²b-ab².

Explicação passo-a-passo:

a) (15a-7b+3c)+(-8b+3c-9a)=

15a-7b+3c-8b+3c-9a=

15a-9a-7b-8b+3c+3c=

6a-15b+6c

b) (2y²-3ay+4a²)-(ay-5y²-a²)=

2y²-3ay+4a²-ay+5y²+a²=

2y²+5y²+4a²+a²-3ay-ay=

7y²+5a²-4ay

c) (3a³-2a²b+5ab²-b³)+(7a²b-5a³+b³-6ab²)=

3a³-2a²b+5ab²-b³+7a²b-5a³+b³-6ab²=

3a³-5a³-b³+b³-2a²b+7a²b+5ab²-6ab²=

-2a³+5a²b-ab²