Bonjour,
Calculer:
E=7x*x-3*7-2*x au carré -7*x*(-7)
E= 7x²-21-2x²+49x
E= 5x²+49x-21
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Bonjour,
Calculer:
E=7x*x-3*7-2*x au carré -7*x*(-7)
E= 7x²-21-2x²+49x
E= 5x²+49x-21