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The equation is  x^{2} -1=0
Here, a=1

Discriminant=D= b^{2} -4ac
                        = 0^{2} -4(1)(-1)
Roots of the equation are
x=-b+/- \sqrt{D} /2a

x=-b+ \sqrt{D} /2a  or x=-b- \sqrt{D}

x=-b+ \sqrt{D} /2a
  =-(0)+ \sqrt{4} /2(1)

x=-b- \sqrt{D} /2(1)

therefore the roots of the equation are 1,-1

0 0 0
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