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Oceanee9744
@Oceanee9744
April 2019
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Besoin d'aide avec le plus de détails svp:
1)Démontrer que le nombre: (\/¯5-\/¯2) / \/¯3 est égal au nombre: \/¯3 / \/¯5 +
\/¯2
2) Montrer que, tout réel x de ]2;+
∞[: x²+x-6/x
²-x-2 = x+3/x+1
3
) Montrer que, tout réel x: (x-3) (x+2)-x²+x(x-4) = (x-6) (x+1)
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(√5-√2)/√3=(√5-√2)(√5+√2)/(√3(√5+√2)
=(5-2)(√3(√5+√2)
=(√3)/(√5+√2)
(x²+x-6)/(x²-x-2)=((x+3)(x-2))/((x+1)(x-2))
=(x+3)/(x+1)
(x-3)(x+2)-x²+x(x-4)=x²-x-6-x²+x²-4x
=x²-5x-6
=(x-6)(x+1)
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=(5-2)(√3(√5+√2)
=(√3)/(√5+√2)
(x²+x-6)/(x²-x-2)=((x+3)(x-2))/((x+1)(x-2))
=(x+3)/(x+1)
(x-3)(x+2)-x²+x(x-4)=x²-x-6-x²+x²-4x
=x²-5x-6
=(x-6)(x+1)