Answer:yes
Step-by-step explanation:
The answer is: 
The explanation is shown below:
1- You have the following expression given in the exercise:

2- When you multiply signs, you obtain:

3. Now, you must add like terms, as following:

4. Therefore, you have that the expression simplified is:

Step-by-step explanation:
Edit:
a is 18
b is 36
c is 18
d is 18 times sqr root of 3
we have to find address of element -5 in the matrix
We know that
horizontal line represents number of rows
vertical line represents number of columns
We can see that
-5 is in third row
and -5 is in second column
Suppose, we have element in matrix

Here , m is number of rows
and n is number of columns
so, we got


now, we can plug these values
and we get
............Answer