plzz answer no 9 in easiest form.... please be fst today IS MY EXAM
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(1 - x + 1/x ) ^ 2
(1 - x + 1/x)(1 - x + 1/x)
(1 - x + 1/ x - x + x^2 - 1 + 1/ x - 1 + 1/ x ^2 )
(1 - 1- 1 -x - x +1/x +1/x +x^2 + 1/ x^2)
(-1 -2x +2/x + x ^ 2 + 1/ x ^ 2)
(1 - x + 1/x)(1 - x + 1/x)
(1 - x + 1/ x - x + x^2 - 1 + 1/ x - 1 + 1/ x ^2 )
(1 - 1- 1 -x - x +1/x +1/x +x^2 + 1/ x^2)
(-1 -2x +2/x + x ^ 2 + 1/ x ^ 2)
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