bonsoir,
(x+2) (x-4) + (3x-5) (2x+4)
= x² -4x +2x -8 +6x² +12x -10x -20
= 7x² -28
=(x+2) (x-4) + (3x-5) 2 (x+2)
= (x+2) ( x-4 +6x -10)
=(x+2) ( 7x -14)
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bonsoir,
(x+2) (x-4) + (3x-5) (2x+4)
= x² -4x +2x -8 +6x² +12x -10x -20
= 7x² -28
(x+2) (x-4) + (3x-5) (2x+4)
=(x+2) (x-4) + (3x-5) 2 (x+2)
= (x+2) ( x-4 +6x -10)
=(x+2) ( 7x -14)