document.write( "Question 810861: log4(b+27)-log4(b-7)=log4b \n" ); document.write( "

Algebra.Com's Answer #488507 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+log%28+4%2C%28b%2B27%29+%29+-+log%28+4%2C%28b-7%29+%29+=+log%28+4%2Cb+%29+\"$
\n" ); document.write( " $\"+log%28+4%2C+%28+b+%2B+27+%29+%2F+%28+b+-+7+%29+%29+=+log%28+4%2Cb+%29+\"$
\n" ); document.write( " $\"++%28+b+%2B+27+%29+%2F+%28+b+-+7+%29+%29+=+b+\"$
\n" ); document.write( " $\"+b+%2B+27+=+b%2A%28+b+-+7+%29+\"$
\n" ); document.write( " $\"+b+%2B+27+=+b%5E2+-+7b+\"$
\n" ); document.write( " $\"+b%5E2+-+8b+-+27+=+0+\"$
\n" ); document.write( " $\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"$ ( I'll use $\"x\"$ instead of $\"b\"$ )
\n" ); document.write( " $\"+a+=+1+\"$
\n" ); document.write( " $\"+b+=+-8+\"$
\n" ); document.write( " $\"+c+=+-27+\"$
\n" ); document.write( " $\"x+=+%28-%28-8%29+%2B-+sqrt%28+%28-8%29%5E2-4%2A1%2A%28-27%29+%29%29%2F%282%2A1%29+\"$
\n" ); document.write( " $\"x+=+%28+8+%2B-+sqrt%28+64+%2B+108+%29%29+%2F+2+\"$
\n" ); document.write( " $\"x+=+%28+8+%2B-+sqrt%28+172+%29%29+%2F+2+\"$
\n" ); document.write( " $\"+x+=+%28+8+%2B+2%2Asqrt%2843%29+%29+%2F+2+\"$
\n" ); document.write( " $\"+b+=++4+%2B+sqrt%2843%29+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+b+=+4+-+sqrt%2843%29+\"$
\n" ); document.write( "-------------------
\n" ); document.write( " \n" ); document.write( "

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