What is the value of x in the equation 3/5x=-45

For this case we must find the value of the variable "x" of the following equation:

We multiply by 5 on both sides of the equation:

We divide between 3 on both sides of the equation:

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  

correct answer:

i^31 = -i