Réponse :
Explications étape par étape
Bonsoir
a | b | c | ab | (-a) x c | - (ac) | abc
-5 | ... | 4 | 10 | .............. | ........ | ......
.... | ... | 2 | .... | ........... .. | -12 | -36
-5 x b = 10
b = 10/-5 = -2
-a x c = 5 x 4 = 20
-(Ac) = -(-5 x 4) = -(-20) = 20
a x b x c = -5 x -2 x 4 = 40
2eme ligne :
- (a x c) = - a x 2 = -12
a = 12/2 = 6
a x b x c = -36 = 6 x b x 2
b = -36/12
b = -3
a x b = 6 x (-3) = (-18)
-a x c = -6 x 2 = -12
a | b | c | ab | (-a) x c | - (ac) | abc
-5 | -2 | 4 | 10 | ....20....| ...20. | 40...
.6. | -3 | 2 | -18 | ...-12.. | -12 | -36
