Add the Proper Constant to the Binomial So That the Resulting

Multiple Choice

Add the proper constant to the binomial so that the resulting trinomial is a perfect square trinomial. Then factor the
trinomial.
- $$y ^ { 2 } - 10 y$$

A) $y ^ { 2 } - 10 y + 25 = ( y - 5 ) ^ { 2 }$
B) $y ^ { 2 } - 10 y - 100 = ( y - 10 ) ^ { 2 }$
C) $y ^ { 2 } - 10 y - 25 = ( y - 5 ) ^ { 2 }$
D) $y ^ { 2 } - 10 y + 100 = ( y - 10 ) ^ { 2 }$