ratio

In the triangle PQR, the lengths of PT and TR are in the ratio of 3:2. ST is parallel to QR. Two semicircles are drawn with PS and PQ as diameters, as shown in the figure. Which on...

If, for non-zero real variables x, y, and real parameter a > 1, x: y = (a + 1): (a− 1), then, the ratio (x² - y²): (x² + y²) is

If, for non-zero real variables $x$, $y$, and real parameter $a > 1$, $x : y = (a + 1) : (a - 1)$, then, the ratio $(x^2 - y^2) : (x^2 + y^2)$ is