Sorted by: 1 You have to check which divisors of the constant term, 4, are the roots of − λ 3 − 3 λ 2 + 4 = 0. Let a be this divisor (if there are more than one, take one of them), then apply the
How to Factor a Cubic Polynomial: 12 Steps (with Pictures)
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How to Factor Binomial Cubes
But how do we find such a factorization? The following are two methods which I recommend. Factoring by Grouping. This is by far the nicest method of the two, but it only
Factoring Sum and Difference of Two Cubes
I will show you two fool-proof methods to factorise a cubic. This one is a great example: You need to start with a factor. Just try substituting some simple numbers like 1 or 2 or 3 or perhaps – 1
