Question

factorise p^2+q^2+2q-6q^2+3pq+4yz

Answer 1

p(p+3q)+q^2(1+2q-2)+4yz

Answer 2

after successful factoring, we should only see one term
The above answer contains 3 terms, so it is not factored completely.

In the given question, the 4yz messes everything.
The expression cannot be factored.