document.write( "Question 1068968: Can you have a function if the answer includes a sq root? for example y= sqrt (x-3) Doesn't this answer include both negative and positive because of the sqrt? Can you explain why? Thanks. \n" ); document.write( "

Algebra.Com's Answer #684225 by ikleyn(52790) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "When in the school math we consider the functions like these , ,  and so on, \r\n" );
document.write( "the DEFAUL AGREEMENT is in force (in action) that we consider only positive values of the function.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "          If the opposite is not said directly and explicitly.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "In the SAME TIME, if you consider  or solve the equation  = 16, you must take both values +/-4 and both roots +/-4.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "It is ANOTHER AGREEMENT for this ANOTHER specific situation.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "So, for each situation ITS OWN AGREEMENT is in force/(in action).\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "As a rule, in the school math these agreements never prononciate explicitly.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Nevertheless, they ARE in place, they DO act and they ARE in common use.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );