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document.write( "Hi,
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document.write( "vertices on the x-axis: (8,0)and (-8,0) Hyperbola opens right and left.\r
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document.write( "Standard Form of an Equation of an Hyperbola is
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document.write( "where Pt(h,k) is a center with vertices 'a' units right and left of center
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document.write( "and asymptotes that pass thru the center with slope = ± b/a
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document.write( "In this example: center is (0,0) with a = 8
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document.write( " x^2/8^2 - y^2/b^2 = 1
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document.write( "foci (c,0) and (-c,0) are (sqrt(89), 0),-sqrt(89), 0 }}}
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document.write( " c, the distance from the center to the foci
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document.write( " c^ = a^2 + b^2
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= 8^2 + b^2
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document.write( " 89 = 64 + b^2
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document.write( " 25 = b^2
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document.write( " b = ± 5
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document.write( " x^2/8^2 - y^2/5^2 = 1
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