Bonjour,
A = (5x + 1)(2x + 3)
= 10x² + 15x + 2x + 3
= 10x² + 17x + 3
B= (4x - 5)(7x - 1)
= 28x² - 4x - 35x + 5
= 28x² - 39x + 5
C= (2x + 5)(7x - 3)
= 14x² - 6x + 35x - 15
= 14x² + 29x - 15
D = (-4x - 6)(2x - 1)
= -8x² + 4x - 12x + 6
= - 8x² - 8x + 6
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Bonjour,
A = (5x + 1)(2x + 3)
= 10x² + 15x + 2x + 3
= 10x² + 17x + 3
B= (4x - 5)(7x - 1)
= 28x² - 4x - 35x + 5
= 28x² - 39x + 5
C= (2x + 5)(7x - 3)
= 14x² - 6x + 35x - 15
= 14x² + 29x - 15
D = (-4x - 6)(2x - 1)
= -8x² + 4x - 12x + 6
= - 8x² - 8x + 6
A= (5x + 1)(2x + 3)
A= 10x + 2x + 2x + 3
A= 14x + 3
C= (2x+ 5 )(7x -3 )
C= 14x(au carré) - 6x + 35x - 15
C = 14x (au carré) + 29x - 15