rezolvati in multimea numerelor naturale ecuatiile:a)x+17=56 b)x+95=120 c)x+123=250 d)2020+x=2943 e)x-17=73 f)x-127=559 g)x-23=126 h)x-1245=56

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