Question

Write the function in vertex form, and identify its vertex.
g(x) = 5x2 - 50x + 128

a.g(x) = 5(x - 5)2 + 3; (5, 3)
b.g(x) = 5(x - 5)2; (5, 3)
c.g(x) = 5(x - 3)2; (3, 5)
d.g(x) = 5(x - 3)2 + 5; (3, 5)

Answer 1

last one

Answer 2

you can multiply out and see that it is correct