factoriser :
A= x(au carré) + 3x
B= (2x-1) (7x+5) + (2x-1) (3x-4)
C= (x+5) (9x-4) - (x+5) (2x-1)
A= x(au carré) + 3x
B= (2x-1) (7x+5) + (2x-1) (3x-4)
C= (x+5) (9x-4) - (x+5) (2x-1)
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Bonjour;
A= x² + 3x
=x( x +3)
B= (2x-1) (7x+5) + (2x-1) (3x-4)
=(2x-1) ( 7x+5 +3x-4)
= (2x-1) ( 10x +1)
C= (x+5) (9x-4) - (x+5) (2x-1)
= (x+5) ( 9x-4 -2x +1)
= (x+5) ( 7x -3)