What is f(x) = 2x2 + 28x – 5 written in vertex form?

f(x) = 2(x + 7)2 – 19
f(x) = 2(x + 7)2 – 103
f(x) = 2(x + 14)2 – 14
f(x) = 2(x + 14)2 – 98

Vertex form of f(x) is:

Step-by-step explanation:

The vertex form of the function f(x) is:

f (x) =, where (h, k) is the vertex of the parabola.

We are given f(x)=

Now, converting the above equation in required form

Hence, Vertex form of f(x) is:

the value of the x is 73.07

Step-by-step explanation:

The computation of the value of the x is shown below:

Given that

3x ÷ 4 + 2 = 56.8

3x + 8 ÷ 4 = 56.8

3x + 8 = 56.8 × 4

3x + 8 = 227.2

3x = 227.2 - 8

3x = 219.2

x = 73.07

Hence, the value of the x is 73.07

This is the answer but the given options are incorrect