Let the eccentricity of hyperbola be √ 5 / 2 and have a common focus with the square of ellipse x2 / 9 + the square of Y2 / 4 = 1

Let the eccentricity of hyperbola be √ 5 / 2 and have a common focus with the square of ellipse x2 / 9 + the square of Y2 / 4 = 1

The focus coordinates of ellipse x ^ 2 / 9 + y ^ 2 / 4 = 1 are F1 (- √ 5,0); F2 (√ 5,0)
So this becomes the focus of the hyperbola, then C = √ 5; then E = C / a = √ 5 / a = √ 5 / 2
So the hyperbolic equation is: x ^ 2 / 4-y ^ 2 = 1