Factoriser les expressions suivante :
a) E = (5x+2)(4x-3)+(5x+2)(6x+4)
b) F = (7x-1)(4x+2)+5(4x+2)
Merci d'avance
a) E = (5x+2)(4x-3)+(5x+2)(6x+4)
b) F = (7x-1)(4x+2)+5(4x+2)
Merci d'avance
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E = (5x+2)(4x-3) + (5x+2)(6x+4)le facteur commun est 5x+2
E = (5x+2)(4x-3+6x+4)
E = (5x+2)(10x+1)
F = (7x-1)(4x+2) + 5(4x+2)
Le facteur commun est 4x+2
F = (4x+2)(7x-1+5)
F = (4x+2)(7x+4)
= (5x + 2)(4x - 3 + 6x + 4)
= (5x + 2)(10x + 1)
(7x - 1)(4x + 2) + 5(4x + 2)
= (4x + 2)(7x - 1 + 5)
= (4x + 2)(7x + 4)