Question

quero calcular (a²-a+3).(a+b-1)=

Answer 1

$\frac{a^2+a}{b^2+b} * \frac{a^2-a}{b^2-b} * \frac{a^2-a}{a^2-1} \\ \\ \frac{a^2-a}{b^2-b} * \frac{a*(b-1)}{(a-1)*b} \\ \\ \frac{a*(a-1)}{(b-1)*b} * \frac{a(b-1)}{(a-1)*b} \\ \\ \frac{a^2}{b^2}$


Resposta: C