document.write( "Question 935566: what is 5z to the seventh power times 12z to the negative ninth power? \n" ); document.write( "

Algebra.Com's Answer #568804 by Edwin McCravy(20060) $\"\"$ $\"About$

You can put this solution on YOUR website!

\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Then we multiply the 5 by the 12 to get the coefficient.\r\n" );
document.write( "\r\n" );
document.write( "So this means \r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "But it is not necessary to write z 7 times to be multiplied \r\n" );
document.write( "and then 9 more times to be multiplied and then counting the\r\n" );
document.write( "z's to see that there are 16 of them to be multiplied and \r\n" );
document.write( "then write  \r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "We can use the shortcut of adding the exponents 7+9=16 to find\r\n" );
document.write( "the exponent of z.  This is a case of ADDING in order to MULTIPLY!\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( "

\n" );