Quadratic Equations
SAT · Flashcards · Application
SAT · FLASHCARDS
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QUESTION
What is the minimum value of
y
=
x
2
−
6
x
+
9
y = x^2 - 6x + 9
y
=
x
2
−
6
x
+
9
?
QUESTION
Factor
x
2
−
9
x^2 - 9
x
2
−
9
.
QUESTION
Find the vertex of
y
=
−
x
2
+
4
x
−
3
y = -x^2 + 4x - 3
y
=
−
x
2
+
4
x
−
3
.
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ANSWER
Vertex:
(
2
,
1
)
(2, 1)
(
2
,
1
)
. Use
x
=
−
b
2
a
=
2
x = -\frac{b}{2a} = 2
x
=
−
2
a
b
=
2
, then
y
=
−
(
4
)
+
8
−
3
=
1
y = -(4) + 8 - 3 = 1
y
=
−
(
4
)
+
8
−
3
=
1
.
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