Réponse :
Explications étape par étape
Bjr,
A= 5n +2n =7n
B= 0
C= ( n+2) ( 3*n -1) = (n+2)( 3n-1) =
3n² -n +6n -2= 3n² +5n -2
D= 7n-6n =n
E= 4n + 17
F= 3n+5 ( impossible)
G= 3n² +n
H = 3* ( 2n-5) = 6n -15
3(3+2)+ 1 = 3*5 +1 =15+1=16
4(4-3) +2*4= 4*1 +8= 12
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