The distance from a point P on the square of nine times x minus one sixteenth of y to its left quasilinear is 4.5, then the distance from point P to its right focus? I forgot about this kind of question, what is the standard line,

The distance from a point P on the square of nine times x minus one sixteenth of y to its left quasilinear is 4.5, then the distance from point P to its right focus? I forgot about this kind of question, what is the standard line,

X ^ 2 / 9-y ^ 2 / 16 = 1, a = 3, B = 4, C = 5 quasilinear x = ± a ^ 2 / C = ± 9 / 5, so the distance between two quasilinear is 2 * 9 / 5 = 3.6, the distance from P to its left quasilinear is 4.5, the ratio of the distance from the second definition of hyperbola to the distance from the focus to the Quasilinear is e = C / a = 5 / 3P, the distance from P to its left quasilinear is 4.5, so the distance from P to the left focus is 4