document.write( "Question 743641: x-3 square root of x -4=0\r
\n" ); document.write( "\n" ); document.write( "I could not find the square root symbol on my keyboard \n" ); document.write( "
Algebra.Com's Answer #452994 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
x-3 square root of x -4=0
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\n" ); document.write( "x - 3sqrt(x) - 4 = 0
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\n" ); document.write( "3sqrt(x) = x-4
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\n" ); document.write( "Square both sides to get:
\n" ); document.write( "9x = x^2 - 8x + 16
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\n" ); document.write( "x^2 -17x + 16 = 0
\n" ); document.write( "Factor:
\n" ); document.write( "(x-1)(x-16) = 0
\n" ); document.write( "x = 1 or x = 16
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\n" ); document.write( "Check for extraneous solutions:
\n" ); document.write( "x - 3sqrt(x) - 4 = 0
\n" ); document.write( "Test x= 1
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\n" ); document.write( "1 - 3 - 4 = 0 :::: false
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\n" ); document.write( "Test x = 16
\n" ); document.write( "16 - 3*4 - 4 = 0
\n" ); document.write( "16 - 16 = 0 ::::: true
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\n" ); document.write( "Colclusion: x = 16
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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