b) [tex] \frac{ 2x^{3}+2 }{ x^{2}+6x+9}: \frac{ x^{2}-x+1 }{x+3}= \frac{2( x^{3}+1) } {(x+3)^{2}}* \frac{x+3}{ x^{2}-x+1}= \frac{2(x+1)( x^{2}-x+1) }{x+3}* \frac{1}{ x^{2}-x+1}= \frac{2x+2}{x+3} [/tex]
c)[tex] E(\frac{1}{2})= \frac{2* \frac{1}{2}+2 }{ \frac{1}{2}+3}= \frac{3}{ \frac{7}{2}}= \frac{6}{7} [/tex]
