Răspunsuri

2014-05-25T20:00:57+03:00
a) A=-5
B=+11
C=-234
A X B = -55
B X C = -2574
(AxB)xC= 12870
Ax(BxC)= 12870
AxB+AxC -55 - 2574 = 2629
Ax(B+C)=
-5 X (11 - 234) = -5 X -223 = 1115
b)A=51
B=-10
C=+5
AxB= -510
BxC= - 50
(AxB)xC= -2550
Ax(BxC)= - 2550
AxB+AxC -510 - 50 = -560
Ax(B+C)= 51 (-10 + 5) = 51 x -5 = -255
c) A=0

B=81
C=-101
AxB=0
BxC= -8181
(AxB)xC= 0
Ax(BxC)= 0
AxB+AxC = 0 + 0 = 0
Ax(B+C)=
0 x (B +C) = 0