Question

Calcule e fatore quando necessário:

(3a+1/2a-2)-(a+1/a-1)

Answer 1

vamos lá...

$\frac{3a+1}{2a-2} - \frac{a+1}{a-1} = \\ \\ \frac{3a+1}{2(a-1)} - \frac{a+1}{a-1} = \\ \\ mmc=2(a-1) \\ \\ \frac{3a+1-2(a+1)}{2(a-1)} = \\ \\ \frac{3a+1-2a-2}{2(a-1)} = \\ \\ \frac{a-1}{2(a-1)} = \frac{1}{2}$ 

Cancela (a-1)