Bonsoir,
A = (x - 1) (4x + 5) + (x - 1) (x + 3)
A = (x - 1) ( 4x + 5 + x + 3)
A = (x - 1) ( 5x + 8)
B = ( 2x - 2) ( 4x + 8) + (x - 3) (2x - 2)
B = (2x - 2) ( 4x + 8 + x - 3)
B = ( 2x - 2) ( 5x + 5)
C = ( x + 1) ( 2x + 3) - (x + 1) (5x - 9)
C = (x +1) ((2x + 3) - (5x - 9))
C = (x + 1) ( 2x + 3 - 5x + 9)
C = (x + 1) ( - 3x + 12)
Bonne soirée.
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Bonsoir,
A = (x - 1) (4x + 5) + (x - 1) (x + 3)
A = (x - 1) ( 4x + 5 + x + 3)
A = (x - 1) ( 5x + 8)
B = ( 2x - 2) ( 4x + 8) + (x - 3) (2x - 2)
B = (2x - 2) ( 4x + 8 + x - 3)
B = ( 2x - 2) ( 5x + 5)
C = ( x + 1) ( 2x + 3) - (x + 1) (5x - 9)
C = (x +1) ((2x + 3) - (5x - 9))
C = (x + 1) ( 2x + 3 - 5x + 9)
C = (x + 1) ( - 3x + 12)
Bonne soirée.