document.write( "Question 263314: Find the root of the quadratic equation. x^2-8x+15=0 \n" ); document.write( "
Algebra.Com's Answer #194025 by Theo(13342)\"\" \"About 
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x^2 - 8x + 15 is the equation.\r
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\n" ); document.write( "\n" ); document.write( "3*5 = 15
\n" ); document.write( "3+5 = 8\r
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\n" ); document.write( "\n" ); document.write( "equation can be factored to (x-5)*(x-3) = 0\r
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\n" ); document.write( "\n" ); document.write( "this is because (x-5) * (x-3) = x*(x-3) - 5*(x-3) = x^2 - 3x - 5x + 15 = x^2 - 8x + 15.\r
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\n" ); document.write( "\n" ); document.write( "solve for x to get x = 5 and x = 3\r
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\n" ); document.write( "\n" ); document.write( "roots of the equation are x = 5 and x = 3\r
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\n" ); document.write( "\n" ); document.write( "graph of this equation looks like the following:\r
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\n" ); document.write( "\n" ); document.write( "\"graph%28600%2C600%2C-6%2C6%2C-6%2C6%2Cx%5E2+-+8x+%2B+15%29\"\r
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\n" ); document.write( "\n" ); document.write( "you can see that the graph of the equation crosses the x-axis at x = 3 and x = 5.\r
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\n" ); document.write( "\n" ); document.write( "those are the values of x when y = 0.\r
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