Factorize ; x²+[1÷x²]+2=0
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x^2+1/X^2+2=0
= x^4+2X^2+1=0×X^2
= x^4+x^2+x^2+1=0
= x^2 (x^2+1)+1 (x^2+1)
= (x^2+1) (x^2+1)
= x^2+1=0
= x= +_1
= x^4+2X^2+1=0×X^2
= x^4+x^2+x^2+1=0
= x^2 (x^2+1)+1 (x^2+1)
= (x^2+1) (x^2+1)
= x^2+1=0
= x= +_1
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