Hi,

x^4-12x^2+11=0   factor  (Note: )

(x^2 - 11)(x^2-1) = 0

Check factoring with FOIL

F	First terms

O	Outside terms

I	Inside terms

L	Last terms

 

Answer by josgarithmetic(39620)   (Show Source): You can put this solution on YOUR website!
 The polynomial is in quadratic form.  You can replace like, .  The constant terms in each binomial factor will need to give product of 11 and sum of -12.  The obvious and correct choice will be -1 and -11.







-

The solutions will be Real Numbers:

EITHER 



 or 

OR





 or 





SUMMARY:  possible solutions for x are -1, 1, -sqrt(11), sqrt(11) 

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