Find the standard equation of hyperbola (1) with focus on X-axis a = 2 √ 5 passing through point a (5,2)
x^2/20 - y^2/b^2 = 1
Substituting (5,2) into
25/20 - 4/b^2 = 1
b^2=16
x^2/20 - y^2/16 = 1
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