document.write( "Question 1038497: (a) Expand (a + 1/a)^2
\n" ); document.write( "(b) Given that a + 1/a =7, use your result in (a) to find the value of a^2 + 1/a^2
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Algebra.Com's Answer #653218 by Alan3354(69443)\"\" \"About 
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(a) Expand (a + 1/a)^2
\n" ); document.write( "= a^2 + 2 + 1/a^2
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\n" ); document.write( "(b) Given that a + 1/a =7, use your result in (a) to find the value of a^2 + 1/a^2
\n" ); document.write( "(a + 1/a)^2 = a^2 + 2 + 1/a^2
\n" ); document.write( "7^2 = a^2 + 2 + 1/a^2 = 49
\n" ); document.write( "a^2 + 1/a^2 = 47
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