<u>Given</u>:
Given that Brendan factored a quadratic trinomial.
The equation is 
The factored form is 
We need to determine the statement that is true about Brendan's work.
<u>Factoring the quadratic trinomial:</u>
The statement that is true about Brendan's work can be determined by factoring the given expression.
Thus, we have;

Splitting the middle term, we have;

Grouping the terms, we have;

Factoring the terms, we have;


Therefore, the complete factor of the quadratic polynomial is 
Hence, Brendan made a mistake. The correct factored form is 
Thus, Option A is the correct answer.