a) 3x^3 - 2x^2 + 27x - 9 = x^2(3x - 2) + 9(3x - 1) = (x^2 + 9)(3x - 1)
b) 6m^2 - 13mn - 5n^2 = (2m + n)(3m - 5n)
a) 3x^3 - 2x^2 + 27x - 9 = x^2(3x - 2) + 9(3x - 1) = (x^2 + 9)(3x - 1)
b) 6m^2 - 13mn - 5n^2 = (2m + n)(3m - 5n)