Explications étape par étape:
Salut !
M = (2x + 5) (3x + 7)
= 6x² + 14x + 15x + 35
= 6x² + 29x + 35
N = (3x - 1) (3x + 1)
= 9x² + 3x - 3x + 1
= 9x² + 1
O = (4x - 7) (4x + 5)
= 16x² + 20x - 28x + 35
= 16x² - 8x + 35
P = (3x + 9) (-4x - 1)
= -12x² - 3x - 36x + 9
= -12x² -39x + 9
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Explications étape par étape:
Salut !
M = (2x + 5) (3x + 7)
= 6x² + 14x + 15x + 35
= 6x² + 29x + 35
N = (3x - 1) (3x + 1)
= 9x² + 3x - 3x + 1
= 9x² + 1
O = (4x - 7) (4x + 5)
= 16x² + 20x - 28x + 35
= 16x² - 8x + 35
P = (3x + 9) (-4x - 1)
= -12x² - 3x - 36x + 9
= -12x² -39x + 9