<PRE><B>Question 999293</B>
use the information provided to write the standard form equation of each hyperbola 
x^2-y^2+20x+19=0 
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x^2+20x+? - y^2 = -19
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Complete the square::
x^2 + 20x+100 - y^2 = -19+100
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Factor:
(x+10)^2 - (y-0)^2 = 81
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Cheers,
Stan H.
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