Bnsr tt le monde, merci de m'aide a faire cet exercice svp.
1) developpe et reduis les expressions suivantes:
(x+4)(2x+5)+(2x-1)^2
(x-4)(5x+4)-(6x-3)^2
(3x-7)^2-(3x+1)^2

2) factoriseles expressions suivantes:
A=36x^2-96x+64
B=49x^2+28x+4
C=81x^2-126x+49
D=49x^2-36
E=9x^2-54x+81
F=81-9x^2

MERCI D'AVANCE.
C 18pts!!!!!!
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