Factor the GCF: - 6m2 + 18m - 36.

-6 (m2 - 3m + 6)

-1 (6m2 - 18m + 36)

-6m (m2 - 3m + 6)

-6 (m2 + 3m - 6)

The first option is the right one.

You have to find the greates common divisor of the coefficientes, which is - 6 and then divide each momomial with lead to: - 6 (m^2 + - 3m + 6).

You can verifiy the result by multiplying - 6 times the polynomial inside the parenthesis, using the distributive property.