Answer:
a. 0.25
Step-by-step explanation:
The given expression is

Factor the denominator using difference of two squares.

Cancel out common factors;

We plug in 2 to get


Answer:

Step-by-step explanation:
<u>Step 1: Combine</u>
Adding a negative number is same as subtracting a positive number.



Answer: 
Use PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction). Solve the problem in that order.
In this case, you would first solve the parentheses (6.3-4) to get 2.3. The problem is now 8.2+4.1(2.3). Next, multiply 4.1*2.3 to get 9.43. The problem is now 8.2+9.43. After adding, the only thing that remains is 17.63.
So, the answer is B 17.63.
Hope this helps! :)