bonjour
on remplace x par 1/4
A = [(4*1/4) + 1][2*(1/4) - 3] - [(4*1/4) + 1][3*(1/4) + 1]
= [(1 + 1][(1/2) - 3] - [(1 + 1][3/4) + 1]
= 2(1/2 - 6/2) - 2(3/4 + 4/4)
= 2(-5/2) - 2(7/4) (on simplifie par 2)
= -10/2 - 7/2
= -17/2
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bonjour
on remplace x par 1/4
A = [(4*1/4) + 1][2*(1/4) - 3] - [(4*1/4) + 1][3*(1/4) + 1]
= [(1 + 1][(1/2) - 3] - [(1 + 1][3/4) + 1]
= 2(1/2 - 6/2) - 2(3/4 + 4/4)
= 2(-5/2) - 2(7/4) (on simplifie par 2)
= -10/2 - 7/2
= -17/2