x - 4 APEX
(x - 4) or (x + 8)
(x-4)(x-1)
X^2 - 13X + 30 = 0 (X-3)(X-10) easy inspection problem
(x - 3)(x - 11)
X - 4
x - 4 APEX
(x + 12)(x + 7)
(x + 10)(x + 4)
(X + 2)(X + 4) Factored
(x - 4) or (x + 8)
(x-4)(x-1)
(x - 6)(x - 7)
(x + 11) and/or (x - 6)
x2+5x+6 = (x+2)(x+3)
x2-5x+4 = (x-1)(x-4) when factored
You didn't bother to list the binomials to choose from, but the two binomial factors of x2 + 6x - 40 are (x + 10) and (x - 4)