radomes.openskiesproject.org
kaylak88 kaylak88
  • 25-07-2016
  • Mathematics
Answered

What is the vertex of the graph of y = x2 + 4x?

(–2, –12)

(–2, –8)

(–2, –6)

(–2, –4)

Verified Answer :

Professor1994 Professor1994
  • 07-11-2018

Answer: The vertex of the parabola (quadratic function) is (-2,-4)

Fourth option: (-2,-4)


Solution:

y=x^2+4x

y=ax^2+bx+c; a=1, b=4, c=0

Vertex: V=(h,k)

h=-b/(2a)

h=-4/(2(1))

h=-4/2

h=-2

y=x^2+4x

k=y=h^2+4h

k=(-2)^2+4(-2)

k=4-8

k=-4

Vertex: V=(h,k)

Vertex: V=( -2, -4)



Answer Link
kaylaherrera94
kaylaherrera94 kaylaherrera94
  • 17-04-2019

Answer:

-2,-4

Step-by-step explanation:

Answer Link

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