Sagot :

Bonjour,

a) -5x(-4+2)-(-8+2)x(-1)

= 20 -10 -(  8 -2)

= 20 -10 -  8 +2

= 4

b) -48/(2-12/4-7)-4​

-48 /( 8/4 -12/4 - 28/4) -4

= -48 / (-32/4) -4

= -48 / (- 8) -4

=6-4

=  2