x2−y2=1x^{2}-y^{2}=1x2−y2=1
y24−x29=1\frac{y^{2}}{4}-\frac{x^{2}}{9}=14y2−9x2=1
y24−x24=1\frac{y^{2}}{4}-\frac{x^{2}}{4}=14y2−4x2=1
y242−x232=1\frac{y^{2}}{4^{2}}-\frac{x^{2}}{3^{2}}=142y2−32x2=1