Expand (x^2+x-1)^2 and please give me answer.
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(x^2+x-1)^2 can also be written as
(x^2)^2+(x-1)^2
=x^4+x^2-2x+1
(x^2)^2+(x-1)^2
=x^4+x^2-2x+1
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