F(x) = 5x2 – 20x + 26
in vertex form

Step-by-step explanation:

we have

This is the equation of a vertical parabola open upward

The vertex is a minimum

The equation of a vertical parabola in vertex form is equal to

where

(h,k) is the vertex

Convert the given function to vertex form

Factor the leading coefficient

Complete the square

Rewrite as perfect squares

------> equation in vertex form

The vertex is the point (2,6)

the answer is c. 23/3

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d