Réponses

  • Utilisateur Brainly
2013-06-02T08:49:00+02:00

(1-√2)^(-3) * (√8-2)

=(√8-2)/(1-√2)^3

=(2√2-2)/(1-3√2+3*2-2√2)

=(2√2-2)/(7-5√2)

=2(√2-1)(7+5√2)/(49-25*2)

=-2(7√2-7+10-5√2)

=-2(3+2√2)

=-6-4√2