210,64,000,50 is the anwser
The answer would be about 66. Ps . I hate that website. It's for common core learingl it is soooo boring !
The answer is 1/4 because 7/12 is larger than 1/2 but 1/4 is 2x smaller
X=-1.5. this is the axis of symmetry. (-b/2a) then plug in this value to find the vertex