Answers

2016-03-16T12:50:40+05:30
The equation is  x^{2} -1=0
Here, a=1
          b=0
          c=-1

Discriminant=D= b^{2} -4ac
                        = 0^{2} -4(1)(-1)
                         =4
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)
   =2/2=1

x=-b- \sqrt{D} /2(1)
  =-2/2=-1


therefore the roots of the equation are 1,-1
  =

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