document.write( "Question 75504: What expression raised to the fourth power is 81x12y8z16? \n" ); document.write( "
Algebra.Com's Answer #54223 by bucky(2189)\"\" \"About 
You can put this solution on YOUR website!
Take the one-forth power of \"81%2Ax%5E12%2Ay%5E8%2Az%5E16\"
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\n" ); document.write( "When you do you can write this as:
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\n" ); document.write( "\"%2881%2Ax%5E12%2Ay%5E8%2Az%5E16%29%5E%281%2F4%29\"
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\n" ); document.write( "This can be \"expanded\" by raising each of the 4 factors to the \"1%2F4\" power to get:
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\n" ); document.write( "You can use a calculator (or you may be able to figure out) that the 4th root of 81 is
\n" ); document.write( "either plus 3 or minus 3. For each of the other factors you can follow the power rule and
\n" ); document.write( "multiply the exponent of the term by \"1%2F4\". When you do that you get:
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\n" ); document.write( "\"%28x%5E12%29%5E%281%2F4%29+=+x%5E%2812%2A%281%2F4%29%29=+x%5E%2812%2F4%29+=+x%5E3\"
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\n" ); document.write( "and
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\n" ); document.write( "\"%28y%5E8%29%5E%281%2F4%29+=+y%5E%288%2A%281%2F4%29%29+=+y%5E%288%2F4%29+=+y%5E2\"
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\n" ); document.write( "and, finally
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\n" ); document.write( "\"%28z%5E16%29%5E%281%2F4%29+=+z%5E%2816%2A%281%2F4%29%29+%2B+z%5E%2816%2F4%29+=+z%5E4\"
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\n" ); document.write( "When you multiply all four of these results together you get:
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\n" ); document.write( "\"%2B3%2Ax%5E3%2Ay%5E2%2Az%5E4\" and \"-3%2Ax%5E3%2Ay%5E2%2Az%5E4\"
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\n" ); document.write( "and those two are the answers to the problem. You can check by multiplying both the answers
\n" ); document.write( "times themselves 4 times (four factors multiplied together) and see if you don't get back to
\n" ); document.write( "the original expression.
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