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Sagot :

ALEK75

1. E = 9x²-25+(3x-5)(2x+15) = 15x²+35x-100

2. 9x²-25 = (3x-5) (3x+5)

3. E = 5(x+4)(3x-5)

Le 3. Ces E =5(x+4)(3x-5)

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