C-11-Q084mediumsingle_mcqx2+y2x2−y2=1715\dfrac{x^2+y^2}{x^2-y^2}=\dfrac{17}{15}x2−y2x2+y2=1517 হলে x:y=?x:y = ?x:y=?a4:14:14:1b1:41:41:4c17:1517:15