BONSOIR URGENT BESOIN D AIDE Développer
a) (9x+7)²
b) (5x-3)²
c) (7x+2) (7x-1)

factoriser
a) x²+2x
b) 9x²+12x+4
c) x²-6x+9
d) 4x²-8x+2

Merci pour votre aide
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