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Byju's Answer
Standard XIII
Mathematics
Graph of Quadratic Expression
If the curve ...
Question
If the curve
y
=
a
x
2
+
b
x
+
c
=
0
has
y
-intercept
6
and vertex as
(
5
2
,
49
4
)
,
then the value of
a
+
b
+
c
is
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Solution
y
=
a
x
2
+
b
x
+
c
=
0
y
-intercept
=
6
⇒
c
=
6
(
−
b
2
a
,
−
D
4
a
)
=
(
5
2
,
49
4
)
⇒
−
b
2
a
=
5
2
⇒
b
=
−
5
a
and
−
(
b
2
−
4
a
c
)
4
a
=
49
4
⇒
c
−
b
2
4
a
=
49
4
⇒
6
−
25
a
2
4
a
=
49
4
(
∵
b
=
−
5
a
)
⇒
a
=
−
1
⇒
b
=
5
∴
y
=
−
x
2
+
5
x
+
6
⇒
a
+
b
+
c
=
10
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0
Similar questions
Q.
If the curve
y
=
a
x
2
+
b
x
+
c
has
y
-intercept
6
and vertex as
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5
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,
49
4
)
,
then the value of
a
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If
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and two
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Q.
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z
)
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+
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Find the value of
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Graph of Quadratic Expression
Standard XIII Mathematics
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