document.write( "Question 1118427: z^2-4z=0 \n" ); document.write( "
Algebra.Com's Answer #733752 by ankor@dixie-net.com(22740)\"\" \"About 
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z^2 - 4z = 0
\n" ); document.write( "add 4z to both sides
\n" ); document.write( "z^2 = 4z
\n" ); document.write( "divide both sides by z
\n" ); document.write( "z = 4
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check
\n" ); document.write( "z^2 - 4z = 0
\n" ); document.write( "z = 4
\n" ); document.write( "4^2 - 4(4) = 0
\n" ); document.write( "16 - 16 = 0 \n" ); document.write( "
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