document.write( "Question 77283:  The value of x in the equation log (x-1)9=2 is 
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Algebra.Com's Answer #55386 by stanbon(75887)    ![]() You can put this solution on YOUR website! log (x-1)9=2 \r \n" ); document.write( "\n" ); document.write( "In exponential form this can be written as follows:\r \n" ); document.write( "\n" ); document.write( "(x-1)^2 = 9\r \n" ); document.write( "\n" ); document.write( "(x-1)^2-9 = 0 \n" ); document.write( "Factor to get: \n" ); document.write( "(x-1)-3 = 0 or (x-1)+3=0 \n" ); document.write( "x=4 = x=-2 \n" ); document.write( "But x cannot be -2 because the base of the log must \n" ); document.write( "be greater than zero. \n" ); document.write( "So, only solution is x=4\r \n" ); document.write( "\n" ); document.write( "-------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "  |