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Sagot :

bonjour

9

aire rectangle = longx larg

aire 1=2x*6x=12x²

aire 2=(120-6x)*(2x)=240x-12x²

aire 3=(120-6x) (40-2x)=4800-240x-240x+12x²=12x²-480x+4800

aire 4=6x*(40-2x)=240x-12x²

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