Answer:
(x+1) (x-1) (x+2) (x-2)
Step-by-step explanation:
<u>Let u = x^2</u>
= u^2 - 5u + 4
<u>(Factor u^2 - 5u + 4)</u>
= (u-1) (u-4)
<u>Substitute back u = x^2</u>
= (x^2 -1 ) (x^2 - 4)
<u>Factor x^2 - 1 and x^2 -4</u>
= (x+1) (x-1) (x+2) (x-2)
Hope this helped... :)
If you need to see the work for yourself, copy/paste this link
https://www.symbolab.com/solver/factor-calculator/factor%20x%5E%7B4%7D%20%E2%88%92%205x%5E%7B2%7D%20%2B%204%20
Answer:
The third option
Step-by-step explanation:
The third option represents 65 over 100, meaning 65% of whatever of it would the 65% of 90 be
Answer:

Step-by-step explanation:
Given:
Number of people to be seated should be greater than 75.
Let
be the number of people. So,

Now, there is a single private chef's table that can seat 3 people.
Tables bought by the owner = 
Number of people seated in 1 table = 4
So, number of persons that can be seated in
tables = 
Now, total number of persons that can be seated in these two types of tables is the sum of 3 and 
Therefore, 
But, 
Hence, the inequality to show the situation is:

As we already have the model that describes the change of the population in Italy in terms of the years that have elapsed, we only have to replace the conditions that are requested in that equation.
Therefore to find the population of Italy in the year 2000 (t = 10 years) substitute t = 10 in the equation and have:

million people
To find the population of Italy in 2008 (t = 18 years)
substitute t = 18 in the equation and have:

million people
To predict the population in Italy for 2015 and 2020 with this model, we substitute in the equation t = 25 and t = 30
t = 25
million people
t = 30
million people