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Sagot :

AYUDA

si a =3

avec * = multiplié par

a) 5a +8 = 5*a + 8 = 5*3 + 8 = 15+8=23

b) 6-2a = 6 - 2*a = 6 - 2*3 = 0

c) 4(a+2) = 4 (3+2) = 4*5 = 20

d) a*2 = a*a = 3² = 9

e) a*3 = a*a*a = 3³ = 27

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