document.write( "Question 45873: 7xsquared + 12x + 1 = 0 \n" ); document.write( "

Algebra.Com's Answer #30462 by tutorcecilia(2152) $\"\"$ $\"About$

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Use the quadratic formula where:
\n" ); document.write( "a=7
\n" ); document.write( "b=12
\n" ); document.write( "c=1
\n" ); document.write( ".
\n" ); document.write( ".\r
\n" ); document.write( "\n" ); document.write( " $\"x+=+%28-12+%2B-+sqrt%28+12%5E2-4%2A7%2A1+%29%29%2F%282%2A7%29+\"$ [Plug-in the values and solve]
\n" ); document.write( " $\"x+=+%28-12+%2B-+sqrt%28+144-28+%29%29%2F%2814%29+\"$ [Combine terms and simplify]
\n" ); document.write( " $\"x+=+%28-12+%2B-+sqrt%28+116+%29%29%2F%2814%29+\"$ [Factoring 116 = 4*29]
\n" ); document.write( " $\"x+=+%28-12+%2B-+2sqrt%2829%29%29%2F%2814%29+\"$
\n" ); document.write( " $\"x+=+2%28-6+%2B-+sqrt%2829%29%29%2F%2814%29+\"$ [Factor out \"2\"]
\n" ); document.write( " $\"x+=+%28-6+%2B-+sqrt%2829%29%29%2F%287%29+\"$ [Cancel out] \n" ); document.write( "

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