Answer:
x¹³ - x⁹ - 9x⁸ + 9x⁴
Explanation:
Before we begin, remember the following:
xᵃ * xᵇ = xᵃ⁺ᵇ
Now, for the given:
To answer the question, we will simply multiply each term from the first bracket by each term from the second bracket and then combine like terms to get the final expression.
This can be done as follows:
(x⁸ - x⁴)(x⁵ - 9)
x⁸(x⁵) + x⁸(-9) - x⁴(x⁵) - x⁴(-9)
x¹³ - 9x⁸ - x⁹ + 9x⁴
Rearrange in order of decreasing powers, we will end up with:
x¹³ - x⁹ - 9x⁸ + 9x⁴
Hope this helps :)
Answer:
C) 
Step-by-step explanation:
Given Equations:
A) 
B) 
In order to eliminate
we need to multiply
to equation B and add it to A.
Multiplying
to B.
⇒ 
⇒ 
⇒ 
Adding it equation A.

+ 
We get 
Thus
is eliminated.
So, the expression used to eliminate
is:

Answer:
C
Step-by-step explanation: