Respuestas

2012-10-06T18:45:25+02:00

a/(3a )-1/(64 +12)-(a+12)/a^2=

1/3 - 1/76 - (a+12)/a²=

76a².1/76a²-a²/76a²-76(a+12)/76a²=

(76a²-a²-76(a+12))/76a²=

(75a²-76(a+12))/76a²=

(75a²-76a-912)/76a²=

 

SUERTE!!!