Bonjour, je n'arrive pas a faire ce calcul x(x-1)+3(x+4)=(x-3)(x+5) Merci d'avance ;D
x(x-1)+3(x+4)=(x-3)(x+5)
x² -x +3x +12 = x² +5x -3x -15
x² +2x +12 = x² +2x -15
x²-x² +2x -2x = -15 -12
0 + 0 = - 27
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x(x-1)+3(x+4)=(x-3)(x+5)
x² -x +3x +12 = x² +5x -3x -15
x² +2x +12 = x² +2x -15
x²-x² +2x -2x = -15 -12
0 + 0 = - 27