Given A=x:x is a root of x^2-1=0 , B=x:x is a root of x^2-2x+1=0 then A U B=?

Answers (1)

Solution:   We have ,

                  A=x:x is root of x^2-1=0 = +1,-1

                B= x:x is a root of x^2-2x+1=0=1

             Rightarrow  Acup B= +1,-1  =A    

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