1986 AHSME Problems/Problem 13
Revision as of 17:35, 1 April 2018 by Hapaxoromenon (talk | contribs) (Added a solution with explanation)
Problem
A parabola has vertex . If is on the parabola, then equals
Solution
Consider the quadratic in completed square form: it must be . Now substitute and to give . Now expanding gives , so the product is , which is .
See also
1986 AHSME (Problems • Answer Key • Resources) | ||
Preceded by Problem 12 |
Followed by Problem 14 | |
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