document.write( "Question 1180533: Determine the x-intercept and vertex for this equation:
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Algebra.Com's Answer #810235 by ikleyn(52794) $\"\"$ $\"About$

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\n" ); document.write( "Determine the x-intercept and vertex for this equation:
\n" ); document.write( "y = (x - 3)(x + 5)
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document.write( "You have a quadratic finction, presented as the product of two linear binomials.\r\n" );
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document.write( "The x-intercepts are the zeroes of these binomials.\r\n" );
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document.write( "One x-intercept  x= 3  comes as the zero of the binomial (x-3).\r\n" );
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document.write( "The other x-intercept  x= -5  comes as the zero of the binomial (x+5).\r\n" );
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document.write( "The x-coordinate of the vertex is exactly half-way between the x-inercepts   =  =  = -1.\r\n" );
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document.write( "The y-coordinate of the vertex is the value of the given quadratic function at x=  = -1.\r\n" );
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document.write( "So,   = (-1 -3)*(-1+5) = -4*4 = -16.\r\n" );
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document.write( "The coordinates of the vertex are  (, = (-1,-16).\r\n" );
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document.write( "                          The plot\r\n" );
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document.write( "    \r\n" );
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document.write( "              The plot  y = (x - 3)(x + 5).\r\n" );
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