Three polynomials are factored below, but some coefficients and constants are missing. All of the missing values of a, b, c, and d are integers

1.x^2 - 6x + 8 = (ax + b)(cx + d)
2.3x^3 - 6x^2 - 24x = 3x(ax + b)(cx + d)
3.2x^2 - 2x - 24 = (ax + b)(cx + d)​