Question Number 126205 by mathmax by abdo last updated on 18/Dec/20
$$\mathrm{calculate}\:\int\int\:_{\left[\mathrm{0},\mathrm{1}\right]^{\mathrm{2}} } \:\:\:\:\:\frac{\mathrm{dxdy}}{\:\sqrt{\mathrm{x}^{\mathrm{2}} +\mathrm{y}^{\mathrm{2}} }\:+\mathrm{xy}} \\ $$