[tex] \frac{ 4x^{2}+4x+1 }{ x^{2} -9} * \frac{2 x^{2} -6x}{6x+3} = \frac{(2x)^{2}+2*2x*1+ 1^{2} }{ x^{2} - 3^{2} } * \frac{2x(x-3)}{3(2x+1)}= \frac{(2x+1)^{2} }{(x-3)(x+3)}* \frac{2x(x-3)}{3(2x+1)} [/tex]
Simplifica (2x+1)² si 2x+1 prin 2x+1, x-3 si x-3 prin x-3
[tex]= \frac{2x+1}{x+3} * \frac{2x}{3}= \frac{2x(2x+1)}{3(x+3)} [/tex]
