Bonjour;
a)
2x² +10x -3x -15
= 2x² +7x -15
b)
24x -28x² +6 -7x
= -28x² +30x +6
c)
(4x -16) ( 5x+3)
= 20x² +12x -80x -48
= 20x² -68x -48
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Bonjour;
a)
2x² +10x -3x -15
= 2x² +7x -15
b)
24x -28x² +6 -7x
= -28x² +30x +6
c)
(4x -16) ( 5x+3)
= 20x² +12x -80x -48
= 20x² -68x -48