document.write( "Question 1021439: Please solve this equation with quadratic formula or other method (if possible)
\n" ); document.write( "〖-8y〗^2+2y+7=0\r
\n" ); document.write( "\n" ); document.write( "Workings very much appreciated,
\n" ); document.write( "Sally \n" ); document.write( "

Algebra.Com's Answer #637160 by MathLover1(20849) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( " $\"%28-8y%29%5E2%2B2y%2B7=0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"64y%5E2%2B2y%2B7=0\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"y+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y+=+%28-2+%2B-+sqrt%28+2%5E2-4%2A64%2A7%29%29%2F%282%2A64%29+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y+=+%28-2+%2B-+sqrt%28+4-1792%29%29%2F128+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y+=+%28-2+%2B-+sqrt%28+-1788%29%29%2F128+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y+=+%28-2+%2B-+2sqrt%28+447%29%2Ai%29%2F128+\"$ ......simplify\r
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\n" ); document.write( "\n" ); document.write( " $\"y+=+%28-1+%2B-+sqrt%28+447%29%2Ai%29%2F64+\"$ \r
\n" ); document.write( "\n" ); document.write( "solutions:\r
\n" ); document.write( "\n" ); document.write( " $\"y+=+%28-1+%2B+sqrt%28+447%29%2Ai%29%2F64+\"$
\n" ); document.write( "or
\n" ); document.write( " $\"y+=+%28-1+-+sqrt%28+447%29%2Ai%29%2F64+\"$ \r
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