document.write( "Question 596123: 9x2(power 2) + 6x = -1. Put in quadratic formula and solve \n" ); document.write( "

Algebra.Com's Answer #377545 by josmiceli(19441) $\"\"$ $\"About$

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$\"+9x%5E2+%2B+6x++=+-1+\"$
\n" ); document.write( " $\"+9x%5E2+%2B+6x+%2B+1+=+0+\"$
\n" ); document.write( "This is in the form $\"+ax%5E2+%2B+b%2Ax+%2B+c+=+0+\"$
\n" ); document.write( "The quadratic formula is
\n" ); document.write( " $\"+x+=+%28-b+%2B-+sqrt%28+b%5E2+-+4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29+\"$
\n" ); document.write( " $\"+a+=+9+\"$
\n" ); document.write( " $\"+b+=+6+\"$
\n" ); document.write( " $\"+c+=+1+\"$
\n" ); document.write( " $\"+x+=+%28+-6+%2B-+sqrt%28+6%5E2+-+4%2A9%2A1+%29%29+%2F+%282%2A9%29+\"$
\n" ); document.write( " $\"+x+=+%28+-6+%2B-+sqrt%28+36+-+36+%29%29+%2F+18+\"$
\n" ); document.write( " $\"+x+=+%28+-6+%2B-+sqrt%28+0+%29%29+%2F+18+\"$
\n" ); document.write( " $\"+x+=++-%286+%2F+18%29+\"$
\n" ); document.write( " $\"+x+=+-%281%2F3%29+\"$ answer
\n" ); document.write( "check:
\n" ); document.write( " $\"+x+%2B+1%2F3+=+0+\"$
\n" ); document.write( " $\"+3x+%2B+1+=+0+\"$
\n" ); document.write( "This is a double root, so
\n" ); document.write( " $\"+%28+3x+%2B+1+%29%2A%28+3x+%2B+1+%29+=+0+\"$
\n" ); document.write( " $\"+9x%5E2+%2B+6x+%2B+1+=+0+\"$
\n" ); document.write( "OK \n" ); document.write( "

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