I need help with this 1.9 x 10 to the power of 7 = (1 x 10 to the power of 5) (1.9 x 10 to the power of n) i need this put in scientific notation

Step-by-step explanation:

first you can 1.9 7 times then you do it again but to the 10 power

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