document.write( "Question 399436: x-the square root of 4x+45 = 0 \n" ); document.write( "
Algebra.Com's Answer #282855 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!

\n" );
document.write( "Hi
\n" );
document.write( "\"x+-+sqrt%284x%2B45%29+=+0\"
\n" );
document.write( "\"x+=+sqrt%284x%2B45%29\"  |squaring both sides of the equation
\n" );
document.write( "  x^2 = 4x + 45
\n" );
document.write( " x^2 - 4x - 45 = 0
\n" );
document.write( "factoring
\n" );
document.write( " (x-9)(x+5) = 0
\n" );
document.write( " (x+5)=0   x = -5  Extraneous solution  (-5 - sqrt(25) ≠ 0)
\n" );
document.write( " (x-9)=0   x = 9
\n" );
document.write( " \n" );
document.write( "
\n" );