MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions
Problem
A quadratic polynomial f(x) has zeros at x=−4 and x=6. If f(1)=15, which of the following statements is correct?
(a) The leading coefficient is negative and the graph opens upward
(b) The leading coefficient is positive and the graph opens upward
(c) The leading coefficient is negative and the graph opens downward
(d) There is insufficient information to decide the sign of the leading coefficient