How do you factor completely: #6x^4-9x^3-36x^2+54x#?
Factor by grouping to get:
First, note that every term is divisible by
Next, to factor
Next, use the difference of squares identity:
The answer is
Factor by grouping.
Factor out the GCF for each group.
Substitute it back into the previous factorization.
Put all of the factors together.