Will you answer my question?

What signals you that factoring by grouping is the best method to use when factoring a problem?

Of four points are collinear, they are also coplanar

Factor the following polynomial completely 514 + 2013 - 1052 oa. 5121 + 3)( - ) ob. 51%(1 - 3)(1 + 7) oc. 5198 - 3)(x + 7) od 51%(+ 3)(x - 7)