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Sagot :

A)16x²-24x+9=(4x-3)²

B)9x²+25=non factorisable dans IR

C) (5x+3)(5x-6)+(5x+3)(2x+2)=(5x+3)(7x-4)

D)9-6x+4x²=(2x-3)²

E)(4x-3)²+(4x-3)(7x+5)
=(4x-3)(11x+2)

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