Match each equation with its solution set.
a2 − 9a + 14 = 0
a2 + 9a + 14 = 0
a2 + 3a − 10 = 0
a2 + 5a − 14 = 0
a2 − 5a − 14 = 0
{-2, 7}-->
{2, -7}-->
{-2, -7}-->
{7, 2}-->