Answer:
Vertex is at
(
2
,
−
4
)
Step-by-step explanation:
x
v
e
r
t
e
x
=
−
b
2
a
;
y
v
e
r
t
e
x
=
f
(
−
b
2
a
) given the equation in the standard form of
a
x
2
+
b
x
+
c
Given :
y
=
x
2
−
4
x
+
0a
=
1
,
b
=
−
4
,
c
=
0
x
v
e
r
t
e
x
=
−
(
−
4
)
2
⋅
1
=4
2
=
2
y
v
e
r
t
e
x
=
f
(
2
)
=
(
2
)
2
−
4
(
2
)
=
4
−
8
=
−
4
Vertex : (
x
,
y
)
=
(
2
,
−
4
)
graph{x^2-4x [-6.43, 7.62, -5.635, 1.39]}
