HASSAN2357
Answered

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Sagot :

STEF0574

Réponse:

55x2-20x=5x(11x-4)

(-3x+5)(x-7)-3x(-3x+5)=(-3x+5)(x-7-3x)=(-3x+5)(-2x-7)

(4x2-25)-6x-30=(2x-5)(2x+5)-6(x+5)