document.write( "Question 69894: Find the x intercepts
\n" ); document.write( "y = x^2 - 3x - 1\r
\n" ); document.write( "\n" ); document.write( "I do not understand how I am to find the intercepts formula, can anyone help me out on this one please, thank you! \n" ); document.write( "
Algebra.Com's Answer #49862 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Find the x intercepts
\n" ); document.write( "y = x^2 - 3x - 1
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\n" ); document.write( "The x intercepts occur when y = 0, (when a graph crosses the x axis)
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\n" ); document.write( "x^2 - 3x - 1 = 0; solve for x, the solutions will be the x intercepts
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\n" ); document.write( "This equation cannot be factored so you have to find x using the quadratic formula
\n" ); document.write( "In this equation a = 1 b = -3; c = -1
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\n" ); document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( ":
\n" ); document.write( "\"x+=+%28-%28-3%29+%2B-+sqrt%28+-3%5E2-+4+%2A+1+%2A+-1+%29%29%2F%282%2A1%29+\"
\n" ); document.write( ":
\n" ); document.write( "\"x+=+%28%2B3+%2B-+sqrt%28+9+-+%28-4%29+%29%29%2F%282%29+\"
\n" ); document.write( ":
\n" ); document.write( "\"x+=+%28%2B3+%2B-+sqrt%28+9+%2B+4+%29%29%2F%282%29+\"
\n" ); document.write( ":
\n" ); document.write( "\"x+=+%28%2B3+%2B-+sqrt%28+13+%29%29%2F%282%29+\"
\n" ); document.write( ":
\n" ); document.write( "\"x+=+%28%2B3+%2B-+3.6%29%2F%282%29+\"
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\n" ); document.write( "2 solutions:
\n" ); document.write( "\"x+=+%28%2B3+%2B+3.6%29%2F%282%29+\"
\n" ); document.write( "\"x+=+%28%2B6.6%29%2F%282%29+\"
\n" ); document.write( "x = +3.3
\n" ); document.write( "and
\n" ); document.write( "\"x+=+%28%2B3+-+3.6%29%2F%282%29+\"
\n" ); document.write( "\"x+=+%28-.6%29%2F%282%29+\"
\n" ); document.write( "x = -.3
\n" ); document.write( ":
\n" ); document.write( "x = +3.3 and -.3; these are the x intercepts as illustrated in this graph:
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-3%2C+8%2C+-8%2C+8%2C+x%5E2+-+3x+-+1%29+\"
\n" ); document.write( ":
\n" ); document.write( "Notice that the graph \"intercepts\" the x axis at -.3 and + 3.3
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\n" ); document.write( "Can you understand this now?
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