The Roots(f(x), x) command, where f(x) is an algebraic expression, returns as a list of values points where f(x) is zero.
 The Roots(f(x), x = a..b) command, where f(x) is an algebraic expression, returns as a list of values points where f(x) is zero in the interval [a,b].
 If f(x) is an equation, this routine finds the roots of the expression 
 lhs(f(x)) - rhs(f(x))
, in the specified interval if one is provided.
 If the independent variable can be uniquely determined from the expression, the parameter x need not be included in the calling sequence.
 A root (or zero) of f(x) is defined as any point at which the value of the expression f(x) is 
 0
 (zero).
 If the expression has an infinite number of roots, a warning message and sample roots are returned.
The opts argument can contain the following equation that sets computation options.