document.write( "Question 1082504: Hi!! What is log base 4 of X - log base 16 of (x+3) = 1/2 \n" ); document.write( "
Algebra.Com's Answer #853463 by MathTherapy(10699)\"\" \"About 
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document.write( "Hi!! What is log base 4 of X - log base 16 of (x+3) = 1/2\r\n" );
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document.write( " \"log+%284%2C+%28x%29%29+-+log+%2816%2C+%28x+%2B+3%29%29+=+1%2F2\"\r\n" );
document.write( "\"2%2Alog+%282%2C+%28x%29%29+-+log+%282%2C+%28x+%2B+3%29%29+=+2\" ----- Converting from base 4 and base 16 to base 2 \r\n" );
document.write( "\"log+%282%2C+%28x%5E2%29%29+-+log+%282%2C+%28x+%2B+3%29%29+=+2\" ----- Applying \"a%2Alog+%28b%2C+%28c%29%29+=+log+%28b%2C+%28c%5Ea%29%29\"\r\n" );
document.write( "       \"+log+%28highlight%282%29%2C+%28x%5E2%2F%28x+%2B+3%29%29%29+=+highlight_green%282%29\" ---- Applying \"log+%28a%2C+%28b%29%29+-+log+%28a%2C+%28c%29%29+=+log+%28a%2C+%28b%2Fc%29%29\" \r\n" );
document.write( "              \"x%5E2%2F%28x+%2B+3%29+=+highlight%282%29%5Ehighlight_green%282%29\" --- Converting to EXPONENTIAL form\r\n" );
document.write( "              \"x%5E2%2F%28x+%2B+3%29+=+4\"\r\n" );
document.write( "                 \"x%5E2+=+4%28x+%2B+3%29\" ----- Cross-multiplying\r\n" );
document.write( "                 \"x%5E2+=+4x+%2B+12\"\r\n" );
document.write( "         \"x%5E2+-+4x+-+12+=+0\"\r\n" );
document.write( "     (x - 6)(x + 2) = 0 ----- Factoring trinomial\r\n" );
document.write( "x - 6 = 0      OR      (x + 2) = 0 ---- Equating each factor to 0\r\n" );
document.write( "   x = 6      OR       x = - 2 (IGNORE, as this is an EXTRANEOUS solution!\r\n" );
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document.write( "So, only ONE (1) solution applies here, so accept NO OTHER.
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