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Solving Cubic Equation
Let f(x)= 0 be the given cubic equation To solve
the equation, follow the steps given below
1. By trial and error method find a value of a such that f(a)=0
.Note that the value of a is a factor of the constant in the given
equation
2. By factor theorem (x-a) is a factor of f(x).
so f(x)= (x-a) G(x) where G(x) is a quadratic polynomial. G(x)
can be found by synthetic division method
3
Solve G(x)=0 by any method you know.
4 The solutions are a and the solutions of G(x)=0
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