Question

Which function in vertex form is equivalent to f(x) = x2 + x +1?

Answer 1

Answer: C

Step-by-step explanation:

2020edg

Answer 2

Answer:

C

Step-by-step explanation:

Given

f(x) = x² + x + 1

To express in vertex form use the method of completing the square

add/subtract ( half the coefficient of the x- term)² to x² + x

x² + 2($\frac{1}{2}$)x + $\frac{1}{4}$ - $\frac{1}{4}$ + 1

= (x + $\frac{1}{2}$)² + $\frac{3}{4}$ → C