Question

Alguem me ajuda??

A) 7 x (a - 2b) =

B) 4y x (a + b) =

C) 2a x (a² - 2a +5) =

D) (3a + 2) x (2a + 1) =

E) (a + 7) x (a - 4) =

F) (2ab + 5) x (2b - 5) =

Answer 1

Resposta:

a) 7a-14b. d) 6a²+7a+2.

b) 4ay+4by. e) a²+3a-28.

c) 2a³-4a²+10a. f) 4ab²-10ab+10b-25.

Explicação passo-a-passo:

a) 7.(a-2b)=

7a-14b

b) 4y.(a+b)=

4ay+4by

c) 2a.(a²-2a+5)=

2a³-4a²+10a

d) (3a+2).(2a+1)=

6a²+3a+4a+2

6a²+7a+2

e) (a+7).(a-4)=

a²-4a+7a-28=

a²+3a-28

f) (2ab+5).(2b-5)=

4ab²-10ab+10b-25