Answer:
[tex](-7x^2+3)(x-3)[/tex]
Step-by-step explanation:
We can take "common" from first 2 terms and common from next 2 terms. Shown below:
[tex]-7x^3+21x^2+3x-9\\-7x^2(x-3)+3(x-3)\\(-7x^2+3)(x-3)[/tex]
That's how we do it. We can't simplify, or factor, any further.
