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

For this case we will solve the equations step by step:

 a2 - 9a + 14 = 0
 (a-7) * (a-2) = 0
 a1 = 7
 a2 = 2
 {7, 2}

 a2 + 9a + 14 = 0
 (a + 7) * (a + 2) = 0
 a1 = -7
 a2 = -2
 {-2, -7}

 a2 + 5a - 14 = 0
 (a + 7) * (a-2) = 0
 a1 = -7
 a2 = 2
 {2, -7}

 a2 - 5a - 14 = 0
 (a-7) * (a + 2) = 0 
 a1 = 7
 a2 = -2
 {-2, 7}

The correct answer is: 2