document.write( "Question 1107908: Given the vertex of a parabola of (4, –8) that passes through the point (2, 20), what is the vertex form of the quadratic equation? \n" ); document.write( "
Algebra.Com's Answer #722959 by josgarithmetic(39617)\"\" \"About 
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y=a(x-4)^2-8, if this parabola has vertical symmetry axis
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\n" ); document.write( "x=a(x-4)+8, if parabola has horizontal symmetry axis\r
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\n" ); document.write( "\n" ); document.write( "Solve the equation for a, and substitute the x & y coordinates of the point, and evaluate your factor a.
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