Sagot :
Salut !
distributivité et double distributivité
A = 2(a+5) = 2a+10
B = 3a(a+6) = 3a²+18a
C = -2a(3a-5) = -6a²+10a
D = (a+4)(4+3) = (a+4)7 = 7a+28
E = (2a+5)(3a+6) = 6a²+12a+15a+30 = 6a²+27a+30
Bonjour,
Développer:
A= 2(a+5)= 2a+10
B= 3a(a+6)= 3a²+18a
C= -2a(3a-5) = - 6a²+10a
D= (a+4)(4+3) = 4a+16+3a+12= 7a+28
E= (2a+5)(3a+6) = 6a²+15a+12a+30= 6a²+27a+30