What is the complete factorization of the polynomial below? x3 - 4x2 + x - 4 a.(x + 4)(x + i)(x - i) b.(x - 4)(x - i)(x - i) c.(x + 4)(x - i)(x - i) d.(x - 4)(x + i)(x - i)?

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1