The standard form of the equation of a parabola is y= x2 - 6x + 14.
What is the vertex form of the equation?
O A. y=(x-3)2 + 23
O B. y=(x-3)2 + 15
O C. y=(x-3)2 + 5
O D. y= (x+3)(x - 3) + 5
SUBMIT

Respuesta :

Option C

The vertex form of the equation is:

[tex]y = (x - 3)^2 + 5[/tex]

Solution:

The vertex form of equation is given as:

[tex]y = a(x- h)^2 + k[/tex]

Where, (h, k) is the vertex

Given that,

[tex]y = x^2 - 6x + 14[/tex]

We have to find the vertex form of equation

Step 1:

Complete the square for [tex]x^2 - 6x + 14[/tex]

[tex]\text{ Use the form } ax^2 + bx + c \text{ to find values of a, b, c }[/tex]

a = 1

b = -6

c = 14

Consider the vertex form of a parabola.

[tex]a(x + d)^2 + e ----- eqn 1[/tex]

Substitute the values of  a and b into following:

[tex]d = \frac{b}{2a}\\\\d = \frac{-6}{2 \times 1}\\\\d = -3[/tex]

Find the value of "e" using following formula:

[tex]e = c - \frac{b^2}{4a}\\\\e = 14 - \frac{(-6)^2 }{4 \times 1}\\\\e = 14 - 9\\\\e = 5[/tex]

Substitute the values of a, d, e in eqn 1

[tex]y = 1(x -3)^2 + 5\\\\y = (x - 3)^2 + 5[/tex]

Thus vertex form form is found. Option C is correct

Answer: The vertex form of the equation is C. y=(x-3)2+5

Step-by-step explanation: