document.write( "Question 174244: Please help! I've been show the rules, but I don't know how to apply them, could you please show me how? \r
\n" ); document.write( "\n" ); document.write( "3. Simplify the following expressions:\r
\n" ); document.write( "\n" ); document.write( " a. X4 * X5 (4 & 5 are exponents, I don't know how to type that)\r
\n" ); document.write( "\n" ); document.write( " b. Z9/Z10 (9 & 10 are exponents, I don't know how to type that)\r
\n" ); document.write( "\n" ); document.write( " c. log3Y + log3Z (base 3)\r
\n" ); document.write( "\n" ); document.write( " d. log5Y - log5Z (base 5)
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Algebra.Com's Answer #129179 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Think of the problem as if there were no exponents involved
\n" ); document.write( "(a)
\n" ); document.write( "\"x%5E4+=+x%2Ax%2Ax%2Ax\"
\n" ); document.write( "\"x%5E5+=+x%2Ax%2Ax%2Ax%2Ax\" so,
\n" ); document.write( "\"x%5E4%2Ax%5E5+=+x%2Ax%2Ax%2Ax%2Ax%2Ax%2Ax%2Ax%2Ax\"
\n" ); document.write( "This is \"x\" multiplied by itself \"9\" times, so
\n" ); document.write( "\"x%5E4%2Ax%5E5+=+x%5E9\"
\n" ); document.write( "Aha! You just add the exponents
\n" ); document.write( "You can do any problem this way & discover the rule
\n" ); document.write( "(b)
\n" ); document.write( "\"z%5E9+=+z%2Az%2Az%2Az%2Az%2Az%2Az%2Az%2Az\"
\n" ); document.write( "\"z%5E10+=+z%2Az%2Az%2Az%2Az%2Az%2Az%2Az%2Az%2Az\"
\n" ); document.write( "
\n" ); document.write( "There's 1 more \"z\" in the denominator, I'm left with
\n" ); document.write( "\"z%5E9%2Fz%5E10+=+1%2Fz\" and I know
\n" ); document.write( "\"1%2Fz+=+z%5E-1\"
\n" ); document.write( "Aha!, I just do \"9+-+10+=+-1\"
\n" ); document.write( "---------------------
\n" ); document.write( "As for logs, just do a very simple experiment
\n" ); document.write( "How about \"log%282%2C16%29+%2B+log%282%2C64%29\"
\n" ); document.write( "Big fact: ***** Logs are exponents!!! *****
\n" ); document.write( "So I'm adding 2 exponents here
\n" ); document.write( "The 1st term says: The exponent to the base \"2\" that gives me \"16\"
\n" ); document.write( "The 2nd term says: The exponent to the base \"2\" that gives me \"64\"
\n" ); document.write( "In the 1st case it's \"4\" because \"2%5E4+=+16\"
\n" ); document.write( "In the 2nd case it's \"6\" because \"2%5E6+=+64\"
\n" ); document.write( "So, now I,ve got
\n" ); document.write( "\"log%282%2C16%29+%2B+log%282%2C64%29+=+10\"
\n" ); document.write( "Remember that \"10\" is the sum of 2 logs, so it's a log.
\n" ); document.write( "Express it as log(2,?) or \"log to the base \"2\" that gives me what?
\n" ); document.write( "If I raise \"2%5E10+=+1024\", so
\n" ); document.write( "\"log%282%2C16%29+%2B+log%282%2C64%29+=+log%282%2C1024%29\"
\n" ); document.write( "A better way to write this is:
\n" ); document.write( "\"log%282%2C2%5E4%29+%2B+log%282%2C2%5E6%29+=+log%282%2C2%5E10%29\"
\n" ); document.write( "Aha! Add the exponents
\n" ); document.write( "These can be brain-twisters, and it helps if you've
\n" ); document.write( "wrestled aligators, but there's no easy way out.
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