Question

Determine the axis of symmetry and the vertex of the given function.
y = 2x2 − 12x + 21

Answer 1

-b/2a = -(-12)/2*2
12/4 or 3. X=3
Now put 3 back into the equation for x

2(3)^2 -12(3) +21
18 -36 +21. = 3. Y=3

(3,3)