document.write( "Question 1118176: If x^2+x-1=0 what is the value of x^4+(1/x^4)? \n" ); document.write( "

Algebra.Com's Answer #733429 by ikleyn(52786) $\"\"$ $\"About$

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document.write( "   = -2 = Replace here x^2 with (1-x) since it is given =  - 2 = \r\n" );
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document.write( "=  - 2 =  - 2 =  - 2 =  - 2 =  - 2 \r\n" );
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document.write( "=  - 2 = replace  with 1, since   = (1-x) is given =\r\n" );
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document.write( "=  - 2 = -2 = 9 - 2 = 7.\r\n" );
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