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starlettes12318
@starlettes12318
January 2021
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développer puis réduire A: (7x-1) au carrer +(7x+1) au carrer et b :(5a-4)(a+2)-(a+2) au carrer
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nonotata
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Bonjour
(7x-1)² +(7x+1)²
49x²-14x+1 +49x²+14x+1
98x²+2
(5a-4)(a+2) -(a+2)²
5a²+10a-4a-8 -a²-4a-4
4a²+2a-12
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Thanks 1
starlettes12318
tu est sur ? et mrc beucoup
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on donne E= (3x+2) au carrer-(3x+2)(x+7) a) devolopper et reduire E b) factoriser E c) calculer Epour x =1sur2
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Bonjour(7x-1)² +(7x+1)²
49x²-14x+1 +49x²+14x+1
98x²+2
(5a-4)(a+2) -(a+2)²
5a²+10a-4a-8 -a²-4a-4
4a²+2a-12