Answer:
B. (x+4)(x+i)(x-i)
Step-by-step explanation:
Let 
We can factor this polynomial by grouping:

We factor further to obtain:


We apply difference of two squares to get:

Answer:
The answer is 6
6(5)/8-3=
30/5=
=6
Step-by-step explanation:
Answer:
1.6 OR 8/5
(They are the same thing.)
Answer:
Median is the middle number
Mean is the average
Step-by-step explanation:
for #4
order the tree heights from the least to greatest and the middle number would be your median. If you have an even amount (no middle) then add the two middle numbers and dived it by 2
for # 5
Add the numbers all up on a calculator then dived by the amount of numbers you added.
Really simple :)
Hope that helps!
Answer:
see explanation
Step-by-step explanation:
Using the trigonometric identity
sin²x + cos²x = 1
Consider the left side
2cos²A - 1 ← replace 1 by sin²A + cos²A
= 2cos²A - ( sin²A + cos²A)
= 2cos²A - sin²A - cos²A
= cos²A - sin²A = right side ⇒ verified