1) given x^4 + 95x^2 - 500
2) split in two factors with common factor term x^2: (x^2 + )(x^2 - )
3) find two numbers that add up 95 and their product is - 500:
=> 100*(-5) = - 500 and 100 - 5 = 95
=> (x^2 + 100)(x^2 - 5)
4) factor x^2 - 5 = (x + √5) (x - √5)
5) write the prime factors: (x^2 + 100) (x + √5) (x -√5)
6) find the solutions:
x^2 + 100 = 0 => not possible
x + √5 = 0 => x = - √5
x - √5 = 0 => x = √5
Answer: x = √5 and x = - √5
we know that
To find the company with the greatest total employee compensation package, adds each company's gross pay, paid insurance, and paid time off, then subtract the job expenses on the sum
So
Find the total employee compensation package for each company
Step 
Find the total employee compensation package for company A


Step 
Find the total employee compensation package for company B


Step 
Find the total employee compensation package for company C


Step 
Find the total employee compensation package for company D


therefore
the answer is
the company with the greatest total employee compensation package is the company C
The total cost of the book would be:
12.50* 0.8= 10
The total cost of the book would be $10.00