Question 415852


{{{a^3 - 196a + 2a^2 - 392}}}............reorder the terms


{{{a^3  + 2a^2 - 196a - 392}}}.......group first two and second two

{{{a^2(a  + 2) - 196(a + 2)}}}

{{{(a^2 - 196)(a + 2)}}}...........{{{196=14^2}}}

{{{(a^2 - 14^2)(a + 2)}}}....you can factor the difference of the squares


{{{(a - 14)(a+14)(a + 2)}}}