Bonjour,
Développer et réduire :
E=(x-3)²-(x-1)(x-2)
E = x² - 6x + 9 - (x² - 2x - x + 2)
E = x² - 6x + 9 - x² + 2x + x - 2
E = x² - x² - 6x + 2x + x + 9 - 2
E = - 3x + 7.
=x²-2*3*x+3²-(x²-2x-x+2)
=x²-6x+9-x²+3x-2
E=-3x+7
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Bonjour,
Développer et réduire :
E=(x-3)²-(x-1)(x-2)
E = x² - 6x + 9 - (x² - 2x - x + 2)
E = x² - 6x + 9 - x² + 2x + x - 2
E = x² - x² - 6x + 2x + x + 9 - 2
E = - 3x + 7.
Bonjour,
E=(x-3)²-(x-1)(x-2)
=x²-2*3*x+3²-(x²-2x-x+2)
=x²-6x+9-x²+3x-2
E=-3x+7