Given:
The equation is

To find:
The solution of the given equation.
Solution:
We have,

It can be written as


Multiply both sides by 7.




Divide both sides by 7.


Therefore, the value of z is -2.
Remember that the formula for the circumference,
, of a circle is:

In this case, we are not given the diameter. However, remember that the diameter is equivalent to two times the radius of a circle. Thus,
,
and we can say the circumference of our circle is:

The circumference of our circle is 50.24 units.
<em>Also, a little side note not relating to the question:</em>
<em>Remember that
is spelled as "pi" not "pie." Pie is a dessert, while pi is a mathematical constant.</em>
Answer:
175/48 or 3.64
Step-by-step explanation:
■ Refer to the attachment.
Hope it helps ⚜
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 


