Which best describes the accuracy of Jill’s solution? Jill’s solution is accurate. Jill omitted a factor pair, which affected the GCF and factored expression. Jill made an error when determining the GCF from her list of factors. Jill made an error when writing the factored expression.

Jill made an error when writing the factored expression.

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