Answer:
B
Step-by-step explanation:
Solving
by completing a square gives 
Step-by-step explanation:
We need to solve the equation
by completing a square
The completing a square method requires: 
Solving:

We need to add and subtract (4)^2=16 to make the equation a complete square

So, Solving
by completing a square gives 
Keywords: Solve by completing a square
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Answer:
True
Step-by-step explanation:
2 shirts where both at 20% off for each =
2 * 20% = 40% i.e. 40% off for both shirts