Question

x^2-y^2/x^2+2xy+y^2 при x=23,5 y=6,5

Answer 1

$rm cfrac{x^2-y^2}{x^2+2xy+y^2 } = cfrac{(x-y)(x+y)}{(x+y)^2}= cfrac{x - y}{x + y} = cfrac{23,5 - 6,5}{23,5+6,5} = cfrac{17}{30}$