Demonstrate the process with an example please. When finding the greatest common factor of a polynomial, can it ever be larger than the smallest coefficient?

To find the greatest common factor of a polynomial, find a number that all the coefficients of the polynomial are divisible by. I.e. the GCF of a 9x^2 + 6x + 3 is 3 because all the coefficients (9, 6, 3) are divisible by 3 and the expression simplifies
to 3(3x^2 + 2x + 1).

While the gcf can be smaller than the smallest coefficient

for example 20x^2 + 15x + 10 (gcf is 5, smallest coefficient is 10) 5<10

it CANNOT be larger than the smallest coefficient

since the smallest coefficient has to be larger than or equal to the gcf in order to be divisible by it.

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