on considere l'expression A= 3(2x+4) + 7x(2x+4)

Developper et reduire A.
...........................................................................................................................................

2 Factoriser A
.........................................................................................................................................

3 Calculer A pour x=1

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Grade: Education Subject: mathematiques
on considere l'expression A= 3(2x+4) + 7x(2x+4)

Developper et reduire A.
...........................................................................................................................................

2 Factoriser A
.........................................................................................................................................

3 Calculer A pour x=1
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Best Answer
(232)
bonjour

a = 3 ( 2 x +4) + 7 x ( 2 x +4)

1) a = 6 x + 12 + 14 x + 28 x
    a = 48 x + 12

2) a = (2 x +4) ( 3 + 7 x)

3) pour x = 1
  a = ( 2 + 4) ( 3 + 7) = 6 x 10 = 60

(52)
je dirai que
7x(2x+4)
=14x²+28