document.write( "Question 935085: If x = ( 7 plus 4 sqrt 3 ) , then the value of x squared plus 1 divided by x squared is -----? \n" ); document.write( "
Algebra.Com's Answer #568208 by srinivas.g(540)\"\" \"About 
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\"x+=+7%2B4%2Asqrt%283%29\"
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\n" ); document.write( "Formula: \"+%28a%2Bb%29%5E2=a%5E2%2Bb%5E2%2B2ab\"
\n" ); document.write( " here a = x , b =1/x
\n" ); document.write( " so \"+%28x%2B1%2Fx%29%5E2=+x%5E2%2B%281%2Fx%29%5E2%2B2%2Ax%2A1%2Fx\"
\n" ); document.write( " \"+%28x%2B1%2Fx%29%5E2=+x%5E2%2B1%2Fx%5E2%2B2\"
\n" ); document.write( " move 2 to the right
\n" ); document.write( " \"+%28x%2B1%2Fx%29%5E2+-2+=+x%5E2%2B1%2Fx%5E2\"....eq(1)
\n" ); document.write( "but \"+x=+7%2B4%2Asqrt%283%29\"
\n" ); document.write( " \"1%2Fx++=+1%2F%287%2B4%2Asqrt%283%29%29\"
\n" ); document.write( " we have to rationalize the above term\r
\n" ); document.write( "\n" ); document.write( " multiply and divide with \"%287-4%2Asqrt%283%29%29\"
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\n" ); document.write( " \"+1%2Fx+=+%287-4%2Asqrt%283%29%29%2F%28%287%2B4%2Asqrt%283%29%29%2A%287-4%2Asqrt%283%29%29%29\"
\n" ); document.write( " formula: \"%28p%2Bq%29%2A%28p-q%29=+p%5E2-q%5E2\"
\n" ); document.write( " \"+1%2Fx+=+%287-4%2Asqrt%283%29%29%2F%287%5E2-%284%2Asqrt%283%29%29%5E2%29\"
\n" ); document.write( " \"1%2Fx+=+%287-4%2Asqrt%283%29%29%2F%2849-16%2A3%29\"
\n" ); document.write( " \"1%2Fx+=%287-4%2Asqrt%283%29%29%2F%2849-48%29\"
\n" ); document.write( " \"1%2Fx+=%287-4%2Asqrt%283%29%29\"
\n" ); document.write( " \"+x%2B1%2Fx++=++7%2B4%2Asqrt%283%29%2B7-4%2Asqrt%283%29\"
\n" ); document.write( " \"+x%2B1%2Fx+=+14\"
\n" ); document.write( " put x+1/x = 14 in eq (1)
\n" ); document.write( " \"+14%5E2-2+=x%5E2%2B1%2Fx%5E2\"
\n" ); document.write( "\"196-2=+x%5E2%2B1%2Fx%5E2\"
\n" ); document.write( " \"194+=x%5E2%2B1%2Fx%5E2\"
\n" ); document.write( "so \"+x%5E2%2B1%2Fx%5E2+=194\"
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