What is the first step in writing f(x) = 6x2 + 5 – 42x in vertex form?

a.Factor 6 out of each term.

b.Factor 6 out of the first two terms.

c.Write the function in standard form.

d.Write the trinomial as a binomial squared.

Question

What is the first step in writing f(x) = 6x2 + 5 – 42x in vertex form?

a.Factor 6 out of each term.

b.Factor 6 out of the first two terms.

c.Write the function in standard form.

d.Write the trinomial as a binomial squared.

campbell_st · Answer

well the vertex from requires you to complete the square in x... so it starts with 

$$y = (6x^2 - 42x) + 5$$

the vertex from is 

$$y = a(x - h)^2 + k$$

so you want to convert 

$$6x^2 - 42x $$

into a perfect square in the form above... 

find the common factor... of the 1st 2 terms