Answer:
The solution of
is 64.
Step-by-step explanation:
In Mathematics when two negative numbers are multiplied the result is a positive number, i.e.
.
The expression to be solved is: 
Solve the above expression as follows:

Thus, the solution of
is 64.
Answer:
a. 
Step-by-step explanation:

Expand:




Answer:
a. 
b. 
Step-by-step explanation:










Hope it is helpful....