Réponse :
A=2*x+(-5*x+40)
= -3+-5*x+40
B=2*x+5+(-1*x+8)
= 2*x+-1*x+5+8
= 1+-1*x+13
C=(2*x+5)*3
=6*x+15
D=(16*x+40)+-3
= 16*x+40+-3
= 16*x+40+-3
E=
=1*(2*x+-5)+-1*(8+-1*x)
=(2*x+-5)+(1*x+-8)
=2*x+-5+(1*x+-8)
= 2*x+1*x+-5+-8
= 3+1*x+-13
Explications étape par étape