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NONO60209
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4 Développe et réduis : A = (x+3)(x + 4); B=(2x-3) (-x+ 2); C = (-4x+3)(2x + 1); D=(7x-2) (5x-4); E = (-3x-4) (8 x-7). 4 Développe et réduis : A = ( x + 3 ) ( x + 4 ) ; B = ( 2x - 3 ) ( -x + 2 ) ; C = ( -4x + 3 ) ( 2x + 1 ) ; D = ( 7x - 2 ) ( 5x - 4 ) ; E = ( -3x - 4 ) ( 8 x - 7 ) .​

Sagot :

Bonjour,

4 Développe et réduis :

A = (x+3)(x + 4);

= x² +4x +3x +12

=  x² +7x +12

B=(2x-3) (-x+ 2);

= -2x² +4x +3x -6

= -2x² +7x -6

C = (-4x+3)(2x + 1);

= -8x² -4x +6x +3

= -8x² +2x +3

D=(7x-2) (5x-4);

=35x² -28x -10x +8

= 35x² -38x +8

E = (-3x-4) (8 x-7).

= -24x² +21x -32x +28

= -24x² -11x +28

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