Brainlies asap! create a factorable polynomial with a gcf of 3x. rewrite that polynomial in two other equivalent forms. explain how each form was created.

A GCF, Greatest Common Factor, is the expression that could divide all the expressions in the polynomial to yield the lowest value or factor in each expression. An example of which is,                                    27x³ + 9x² + 3x
The given expression above is a trinomial because there are only three terms. The term that would be able to divide all the terms is 3x. 
To rewrite the expression, we divide all the terms by 3x              (27x³ + 9x² + 3x)/(3x)
Factoring out the numerator,                (3x)(9x² + 3x + 1)

No a triangle cannot be formed because when you add the two smallest number together (which would be 11) the have to be bigger than the number it is "against" ( which would be 12)