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Let f(x) = ax^2 +bx+c (where a!=0 and a,...

Let `f(x) = ax^2 +bx+c` (where `a!=0` and `a,b,c in R`) is a quadratic equation and `D> (a -c)^2` (where D is the discriminant), then number of distinct values of x in `(-1,1)` satisfying the equation `f(x)=0` will be

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