Geometry

The correct answer is C.41.

 

1. Since  is the midpoint of , we know that  (by the definition of a midpoint, which divides a line segment into two equal parts).

Given that  and , we can set up the equation:

 (because  and  when  is the midpoint). So, .

 

2. Expand the left side of the equation:

Using the distributive property , where , , and , we get

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