Question

1 - Sendo A = + 12, B = - 4, C = + 8 e
D = - 2 calcule :

A ) A . B
B ) C . D
C ) A + B . C
D ) (A + D) . (B -C)
E ) C . B - B . A​

Answer 1

Resposta:

1 -A ) -48

B ) -16

C ) -20

D ) -120

E) 16

Explicação:

A ) A×B =

12×(-4) =

-48

B ) C×D =

8×(-2) =

-16

C ) A+B×C =

12+(-4)×8 =

12+(-32) =

12-32 =

-20

D ) (A+D)×(B-C) =

(12+(-2))×(-4-8) =

(12-2)×(-4-8) =

10×(-12) =

-120

E ) C×B-B×A =

8×(-4)-(-4)×12 =

-32-(-48) =

-32+48 =

16