document.write( "Question 892254: Sketch the parabola y = -x^2 + 10x - 16 by finding only the x and y intercepts, the line of symmetry and the vertex. \n" ); document.write( "

Algebra.Com's Answer #540381 by josgarithmetic(39618) $\"\"$ $\"About$

You can put this solution on YOUR website!
The easy way for this one is factoring.\r
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\n" ); document.write( "\n" ); document.write( " $\"y=-x%5E2%2B10x-16\"$
\n" ); document.write( " $\"y=-1%28x%5E2-10x%2B16%29\"$
\n" ); document.write( " $\"y=-1%28x-2%29%28x-8%29\"$ \r
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\n" ); document.write( "\n" ); document.write( "Zeros are at 2 and 8.
\n" ); document.write( "Line of symmetry is in the exact middle of those, at x=5.
\n" ); document.write( "The vertex is a maximum, at $\"y=-1%285-2%29%285-8%29=-1%283%29%28-3%29=9\"$ for the point (5,9).
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