document.write( "Question 20718: CAN SOMEONE, ANYONE PLEASE PLEASE HELP ME!!! I really need help. What is the value of X in the equation, log\"2\"(2x+8) - log\"2\"(2x^2+21x+61) = -3 \n" ); document.write( "
Algebra.Com's Answer #9982 by askmemath(368)\"\" \"About 
You can put this solution on YOUR website!
Did you know that log\"n\"m - log \"n\"b can be re-written as
\n" ); document.write( "log\"n\"\"m%2Fb\"\r
\n" ); document.write( "\n" ); document.write( "So you now get log\"2\"\"%282x%2B8%29%2F%282x%5E2%2B21x%2B61%29\" = -3\r
\n" ); document.write( "\n" ); document.write( "-3 can be re-written as -3 x 1
\n" ); document.write( "and 1 can re-written as log\"2\"2
\n" ); document.write( "which means you now get log\"2\"\"2%5E%28-3%29\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "As it is log\"2\" on both sides now, you can take away the log.\r
\n" ); document.write( "\n" ); document.write( "So you get \"%282x%2B8%29%2F%282x%5E2%2B21x%2B61%29\" = \"2%5E%28-3%29\"\r
\n" ); document.write( "\n" ); document.write( "Can you solve it from here?
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