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Sagot :

Bonsoir,

a.6(3a + 2)

= 18a +12

b.(5 - b) x a

= 5a -ab

c. a(1 + a)

= a+a²

Bonsoir,

A = 6(3a+2)

A = 6×3a+6×2

A = 18a+6×2

A = 18a+12

B = (5-b)×ac

A = 5ac-abc

C = a(1+a)

C = a+a×a

C = a+a²

Bonne soirée.

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