Part A
The given expression is:
We expand to get:
Note that
Part Bi)
The given expression is;
We simplify to get:
Note that:
This is now of the form , where .
This explains why it is a complex number;
Part bii)
The given expression is :
We simplify to get
Part C
We want to simplify:
We rewrite in terms of
Answer:
B
Step-by-step explanation:
#1,4 are biased because the number range is too wide. (include #2 if the question allows)
#1: 31-20 = 11
#2: 29-21 = 8
#3: 30-23 = 7
#4: 50-15 = 35 (OMG that's so biased!)
so if the three surveys are eliminated, then the answer to the second question is 23%.
Hope that helps :)
Answer:
m = ±
Step-by-step explanation:
m² = n ( take square root of both sides )
m = ±