Find Which of the Following Trinomials Is Not Factorable Using $t ^ { 2 } + 12 t + 24$

Multiple Choice

Find which of the following trinomials is not factorable using integers. Match the trinomials to factorable and not factorable .
-factorable

A) $t ^ { 2 } + 12 t + 24$
B) $x ^ { 2 } - 10 x + 21$