Bonsoir,
x*x+x*1-2*x-2*1 = x² + x - 2x - 2 = x² - x - 2
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Bonsoir,
x*x+x*1-2*x-2*1 = x² + x - 2x - 2 = x² - x - 2
A= x*x+x*1-2*x-2*1
A= x(au carré)+x-2x-2
A= x(au carré) -x-2