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développer, réduire, supprimer les parentheses

E=(3x+4) (2x+5)+(4x-5)(2x-3)


F =(x+2)(2x-1)-(x-3)(x+1)

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WINNER123
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E=(3x+4) (2x+5)+(4x-5)(2x-3)
E = (6x² +15x +8x +20) + (8x² -12x -10x +15)
E = 6x² +23x +20 + 8x² -22x +15
F = 14x² +x +35

F =(x+2)(2x-1)-(x-3)(x+1)
F = (2x² -x +4x -2) - (x² +x -3x -3)
F = 2x² +3x - 2 - x² -x +3x +3
F = x² +5x +1