document.write( "Question 432561: What is the sum of the roots of the equation ax^2 + bx + c =0 \n" ); document.write( "

Algebra.Com's Answer #299914 by htmentor(1343) $\"\"$ $\"About$

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From the quadratic formula, the roots are:
\n" ); document.write( " $\"x+=+%28-b+%2B+sqrt%28b%5E2+-+4ac%29%29%2F2a\"$ and $\"x+=+%28-b+-+sqrt%28b%5E2+-+4ac%29%29%2F2a\"$
\n" ); document.write( "These can be written as $\"-b%2F2a+%2B+sqrt%28b%5E2-4ac%29%2F2a\"$ and $\"-b%2F2a+-+sqrt%28b%5E2-4ac%29%2F2a\"$
\n" ); document.write( "Summing the two roots gives:
\n" ); document.write( " $\"-b%2F2a+-+b%2F2a\"$ = $\"-b%2Fa\"$ \n" ); document.write( "

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