Worth 20 points and will mark ! an expression is shown below: 3x3y + 12xy − 9x2y − 36y part a: rewrite the expression so that the gcf is factored completely. show the steps of your work. (4 points) part b: rewrite the expression completely factored. show the steps of your work. (6 points

Gcf termed as the greatest common factor is the greatest number that is divisible to each term inclusive.  in this case, the given function is:   3x3y + 12xy − 9x2y − 36y in which the gcf is 3y,  factoring out 3y from the terms, we get the expression 3y ( 3x3 + 4x - 3x2 - 12).  the final answer to this problem 3y ( 3x3 + 4x - 3x2 - 12