Sagot :

maudmarine

Bonjour

c=(x+5)(4+2)

C = 4x + 2x + 20 + 10

C = 6x + 30

D= (10x+10)X(3 - 3c)+ x - 5

D = 30x - 30cx + 30 - 30x + x - 5

D = - 30cx + 30x - 30x + x + 30 - 5

D = - 30cx + x + 25.