Practice problem
What is the vertex of the parabola y=2x2+4x−9y=2x^2+4x-9y=2x2+4x−9?
(−1,−11)(-1,-11)(−1,−11)
(−1,−9)(-1,-9)(−1,−9)
(−4,−9)(-4,-9)(−4,−9)
(2,−92)(2,-\frac92)(2,−29)
Type a concept, like “slope” or “photosynthesis”.
