Respostas

2013-11-05T14:33:09-02:00
A) (x²+1)²+50=15(x²+1) 
R=(x²+1).(x²+1)+50=15(x²+1)=0 
R=x^4+1x²1x²+1+50-15x²-15=0 
R= x^4-13x²+36=0 
2 2 2