Which is the best method of order of operations

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Which polynomial equation of least degree has -2, -2, 3, and 3 as four of its roots? (x + 2)(x - 3) = 0 (x - 2)-2(x + 3)3 = 0 (x-2 + 2)(x2- 3) = 0 (x + 2)2(x - 3)2 = 0