Question

Calcule o valor da expressão:

Answer 1

Resposta:

$\frac{x^{2} +xy }{x^{2} -y^{2} } .(\frac{1}{y} -\frac{1}{x} )\\\\\\\frac{x (x +y) }{(x -y).(x+y) } .(\frac{x-y}{xy} )\\\\\\\frac{x}{xy} = 1/y=1/5$