document.write( "Question 937581: Evaluate: ((1/sqrt8)^(-2/3))-81^0.75 \n" ); document.write( "

Algebra.Com's Answer #571189 by MathLover1(20850) $\"\"$ $\"About$

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$\"%28%281%2Fsqrt%288%29%29%5E%28-2%2F3%29%29-81%5E0.75\"$ ........since $\"0.75=75%2F100=3%2F4\"$ , we have\r
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\n" ); document.write( "\n" ); document.write( " $\"%281%2F%281%2F%28sqrt%288%29%29%5E%282%2F3%29%29%29-81%5E%283%2F4%29\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"sqrt%288%29%5E%282%2F3%29-81%5E%283%2F4%29\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"root%283%2C%28sqrt%288%29%29%5E2%29-root%284%2C81%5E3%29\"$ .......since $\"81%5E3=%289%5E2%29%5E3=9%5E6=%283%5E2%29%5E6=3%5E12\"$ , we have\r
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\n" ); document.write( "\n" ); document.write( " $\"root%283%2C8%29-root%284%2C3%5E12%29\"$ .........since $\"3%5E12=3%5E3%2A3%5E3%2A3%5E3%2A3%5E3=%283%5E3%29%5E4\"$ , we have\r
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\n" ); document.write( "\n" ); document.write( " $\"root%283%2C3%5E3%29-root%284%2C%283%5E3%29%5E4%29\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"3-3%5E3\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"3-9\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"-6\"$ \r
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