document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=895048>Question 895048</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Are positive irrational numbers closed under addition and multiplication? </SPAN>\n" );
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document.write( "Are positive irrational numbers closed under addition and multiplication?<BR>\n" );
document.write( "A:<BR>\n" );
document.write( "Irrational numbers are NOT closed under addition and multiplication.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%282%29 ALIGN=MIDDLE  ALT=\"sqrt%282%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-sqrt%282%29 ALIGN=MIDDLE  ALT=\"-sqrt%282%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > are both irrational numbers but their sum is zero which is a rational number. Their product is -2 which is also a rational number. </SPAN>\n" );
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