Problem: If the parabola passes through the points , and , the value of is:
Answer Choices:
A.
B.
C.
D.
E.
Solution:
By substituting into the given equation the three sets of -values given, we obtain three equations in , and , namely, . and . Solve the first and third equations for and , using for the value , from the second equation. The values obtained are , and the sum of these is zero.