Question

x^2+y^2 = k^2+1 and xy=k then x-y=?

Answer 1

@mathmath333 help pls I have more questions after

Answer 2

\(\large\tt \begin{align} \color{black}{x^2+y^2=k^2+1\\~\\
x^2-2xy+y^2=k^2-2xy+1\\~\\
(x-y)^2=k^2-2k+1\\~\\
(x-y)^2=(k-1)^2\\~\\
}\end{align}\)