Factoriser au maximum, les expression suivantes : E= 4x² - 1
F = (2x+1)(x+7) + (x-1)(x+7)
G= (2x+1)² - (3x-1)(2x+1)
I= (x-1)² - (2x-3)²
F = (2x+1)(x+7) + (x-1)(x+7)
G= (2x+1)² - (3x-1)(2x+1)
I= (x-1)² - (2x-3)²
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