Factorisez les expressions suivantes: O = (x + 1)(7 - x) - (-1 - x)(x + 7) P= x² + 6x + 9 - (2x - 3)(x + 3) H = (3x - 4)(x + 5) - ( - 6x + 1)(x + 5) E = (8x - 1
Mathématiques
natacha73000
Question
Factorisez les expressions suivantes:
O = (x + 1)(7 - x) - (-1 - x)(x + 7)
P= x² + 6x + 9 - (2x - 3)(x + 3)
H = (3x - 4)(x + 5) - ( - 6x + 1)(x + 5)
E = (8x - 1 )² - (5x + 2)(8x -1)
O = (x + 1)(7 - x) - (-1 - x)(x + 7)
P= x² + 6x + 9 - (2x - 3)(x + 3)
H = (3x - 4)(x + 5) - ( - 6x + 1)(x + 5)
E = (8x - 1 )² - (5x + 2)(8x -1)
1 Réponse
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1. Réponse raymrich
Bonjour,
O = (x+1)(7-x+x+7) = 14(x+1)
P = (x+3)^2-(2x-3)(x+3) = (x+3)(x+3-2x+3) = (x+3)(-x+6)
H = (x+5)(3x-4+6x-1) = (x+5)(9x-5)
E = (8x-1)(8x-1-5x-2) = (8x-1)(3x-3) = 3(8x-1)(x-1)