3lines are shown. one line has points b, a, and e. another line with points c, a, f intersects that line at point a. another line comes out of point a and contains point d. which rays are part of line be? ray a c and ray a e and ray a c and ray a b ray a b and ray a f

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  

93-8=85

855=17

17*4=68

there are 68 purple marbles in that bag