exercice 31 et 35 svp merci :)

bonsoir

n°31

a = x ( 5 + 8) = x ( 13)

b = x ( 7 x  -4)

c = x ( 13 +5 x)

d = x ( 8 x + 1)


N° 35

E = ( 6 + 2 x)²

F = ( 3 x + 2)²

G = ( 1 + 25 x)²

H = ( 2 x + 9)²