5 Développe et réduis :
A=5+ (2x-7) (4-3x);
B=3-(4x + 1) (-x+ 2);
C = 5x-1+ (2x-3) (3x + 1);
D=4x² - (-5x + 2) (x-3);
E = (2x-3) (x + 5)-4 (2x-1).
A=5+ (2x-7) (4-3x);
B=3-(4x + 1) (-x+ 2);
C = 5x-1+ (2x-3) (3x + 1);
D=4x² - (-5x + 2) (x-3);
E = (2x-3) (x + 5)-4 (2x-1).
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