Question 193216
Write the equation of the hyperbola in standard form... 
x^2/9 - 4y^2/9 = 9 
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Multiply thru by (1/9) to get:
x^2 - 4y^2 = 1
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Modify:
x^2/1 - y^2/(1/4) = 1
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Cheers,
Stan H.