x216−y29=0\frac{x^{2}}{16}-\frac{y^{2}}{9}=016x2−9y2=0
x216+y29=0\frac{x^{2}}{16}+\frac{y^{2}}{9}=016x2+9y2=0
y=±34xy=\pm \frac{3}{4} xy=±43x
x=±54yx=\pm \frac{5}{4} yx=±45y