Respuestas

2012-10-04T20:22:42+02:00

 (√2-√5-√7)/(√2+√5+√7)=(√2-(√5+√7))/(√2+(√5+√7))=


=(√2-(√5+√7))(√2-(√5+√7))/(√2+(√5+√7))(√2-(√5+√7))=

=(√2-(√5+√7))²/((√2)²-(√5+√7)²

=2-2.√2.3.+(√5+√7)²/2-5-7

=(2-6√2+(5+2.√7√5+7))/-10

=(14-6√2+2√35)/-10

=(7-3√2+√35)/-5

=(3√2-7-√35)/5


SUERTE!!!!!