Respostas

2013-12-17T15:35:53-02:00
A) (x³+x²-1)(x²-x+1)= x^5+ x^4+x+x^4-x³+x-x-x=  x^5+x^4-x³


B)
(1-x)(1+x+x²)(1+x³+x^6)=
1+x+x+1+x+x-1-x²-x³-1-x^4-x^7+1+x+x+1+x^4+x^4+x+x^4+x^8= +x^8+x^4-x³+x²+7x+2