C is the cost of groceries.
if there is 5% discount, then the current price = 100% - 5% = 95%
= 95% of c
= (95/100) * c
= 0.95c
Answer: 
Step-by-step explanation:
We have the following polynomial:

This is a polynomial of the form
. Following this rule to expand it, we have:


Applying common factor
:

Note the polynomial inside the parenthesis is a perfect square trinomial, which can be factored to
. Hence, the final simplification is:
