How do you factor #y^3-y^2+y-1 # by grouping?
Given expression is
- On inspection we notice that first two terms have a common factor
- if we take out
#y^2#common out of these two what remains is equal to the last two terms.
- The last two do not have any common factor except
Let us therefore group first two and last two terms. We rewrite the expression as
Taking out common factor
Taking out the common factor
We have our required factors.