Question

Using the completing-the-square method, rewrite f(x) = x2 4x − 1 in vertex form.
a. f(x) = (x +2)^2 + 1
b. f(x) = (x + 2^)2
c. f(x) = (x + 2^)2 + 4
d. f(x) = (x + 2)^2 − 5

Answer 1

d) f(x)=(x+2)² -5
by the completion of the square