Question

simplifique a expressão xy+x+y+1 / xy- x + y -1

Answer 1

Olá!

xy+x+y+1 / xy- x + y -1

=> x(y+1)+(y+1)/x(y-1)+(y-1)

=> (y+1)(x+1)/(y-1)(x+1)

=> y+1/y-1

Espero ter ajudado!

Answer 2

simplifique

$\frac{xy+x+y+1}{xy-x+y-1} = \\ \\ \frac{x(y+1)+1(y+1)}{x(y-1)+1(y-1)} = \\ \\ \frac{(x+1)(y+1)}{(x+1)(y-1)} = \\ \\ \frac{y+1}{y-1}$