Aide Pour Vérification

[Kimberly]

Bonjour, j'ai effectué les calculs mais je ne suis pas sure si c'est exact.

Pouvez-vous me corriger s'il y a des fautes?Ce serait gentil =)

Merci d'avance.

A=(x+1+√2)²

=(x+1+√2)(x+1+√2)

=x(x+1+√2)+1(x+1+√2)+√2(x+1+√2)

=x²+x+√2+x+1+√2+x√2+√2+2

=x²+2x+√2(x+3)+3

B=(√x-2)(√x+3x)

=√x(√x+3)-2(√x+3)

=x+3√x-2√x-3

=x+√x-3

c=(√x-2)²

=(√x-2)(√x-2)

=√x(√x-2)-2(√x-2)

=x-2√x-2√x+4

=x-4√x+4

[Barbidoux]

A=(x+1+ 2)^2

=(x+1+ 2)(x+1+ 2)

=x*(x+1+ 2)+1(x+1+ 2)+ 2(x+1+ 2)

=x^2+x+x 2+x+1+ 2+x 2+ 2+2

=x^2+2 (1+ 2) x+2* 2+3

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B=( x-2)( x+3x)

= x ( x+3 x)-2( /uploads/emoticons/default_racine.gif">/uploads/emoticons/default_racine.gif">/uploads/emoticons/default_racine.gif">/uploads/emoticons/default_racine.gif">/uploads/emoticons/default_racine.gif">http://www.e-bahut.com/uploads/emoticons/default_racine.gif' alt=':sqrt:'> x+3 x)

=x+3 *x*/uploads/emoticons/default_racine.gif">/uploads/emoticons/default_racine.gif">/uploads/emoticons/default_racine.gif">/uploads/emoticons/default_racine.gif">/uploads/emoticons/default_racine.gif">http://www.e-bahut.com/uploads/emoticons/default_racine.gif' alt=':sqrt:'> x-2 x-6*x

= 3 *x* x -5*x-2* x

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C exact