Question

The extreme point of f(x)=x^2-x is?
a. (1/2, -1/4)
b. (-1/2, -1/4)
c. (1/2, 1/4)
d. (-1/2, 1/4)

Answer 1

x^2-x=(x-1/2)^2-1/4 <--completing square
therefore, we can find the vertex which is (1/2, -1/4)
The answer is A

Answer 2

Thanks CoCoTsoi