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CBSE Questions for Class 10 Maths Quadratic Equations Quiz 11 - MCQExams.com
CBSE
Class 10 Maths
Quadratic Equations
Quiz 11
Discriminant is_________ for the quadratic equation
x
+
1
x
=
−
5
x
+
1
x
=
−
5
.
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0%
29
0%
21
0%
20
0%
6
In quadratic equation
a
x
2
+
b
x
+
c
=
0
a
x
2
+
b
x
+
c
=
0
, If discriminant
D
=
b
2
−
4
a
c
D
=
b
2
−
4
a
c
, then roots of quadratic equation are :
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0%
real and distinct, if D > 0
0%
real and equal (repeated roots), if D = 0
0%
non-real (imaginary), if D < 0
0%
none of the above
The sun of the values of
x
x
satisfying the equation
(
31
+
8
√
150
)
x
2
−
3
+
1
=
(
32
+
8
√
150
)
x
2
−
3
(
31
+
8
√
150
)
x
2
−
3
+
1
=
(
32
+
8
√
150
)
x
2
−
3
is
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0%
3
3
0%
0
0
0%
2
2
0%
n
o
n
e
o
f
t
h
e
s
e
n
o
n
e
o
f
t
h
e
s
e
To expand
(
4
−
3
x
2
)
−
1
2
(
4
−
3
x
2
)
−
1
2
as the sum of infinite series, then [x] is greater than
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0%
1
√
3
1
√
3
0%
s
q
r
t
3
2
s
q
r
t
3
2
0%
2
0%
1/2
Minimum value of the expression
c
o
s
2
θ
−
(
6
s
i
n
θ
.
c
o
s
θ
)
+
3
s
i
n
2
θ
+
2
c
o
s
2
θ
−
(
6
s
i
n
θ
.
c
o
s
θ
)
+
3
s
i
n
2
θ
+
2
, is -
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0%
4
+
√
10
4
+
√
10
0%
4
−
√
10
4
−
√
10
0%
0
0%
4
What is the value of the discriminant for the quadratic equation:
√
2
x
2
−
5
x
+
√
2
=
0
√
2
x
2
−
5
x
+
√
2
=
0
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0%
−
5
−
5
0%
17
17
0%
√
2
√
2
0%
2
√
2
2
√
2
Find the roots of the following complenting the square.
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0%
x
2
−
4
√
2
x
+
6
=
0
x
2
−
4
√
2
x
+
6
=
0
0%
3
x
2
+
11
x
+
10
=
0
3
x
2
+
11
x
+
10
=
0
0%
2
x
2
+
x
+
4
=
0
2
x
2
+
x
+
4
=
0
0%
4
x
2
+
4
√
3
x
+
3
=
0
4
x
2
+
4
√
3
x
+
3
=
0
Let
α
,
β
α
,
β
be the roots of
a
x
2
+
b
x
+
c
=
0
(
a
≠
0
)
a
x
2
+
b
x
+
c
=
0
(
a
≠
0
)
and
γ
,
δ
γ
,
δ
be the roots of
p
x
2
+
q
x
+
r
=
0
(
p
≠
0
)
p
x
2
+
q
x
+
r
=
0
(
p
≠
0
)
, and
D
1
,
D
2
D
1
,
D
2
be the respective discriminants of these equations. If
α
,
β
,
γ
,
δ
α
,
β
,
γ
,
δ
are in A.P., then
D
1
,
D
2
D
1
,
D
2
equals
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0%
a
2
p
2
a
2
p
2
0%
a
2
b
2
a
2
b
2
0%
b
2
q
2
b
2
q
2
0%
c
2
r
2
c
2
r
2
The discriminant of
√
3
x
2
−
2
√
2
x
−
2
√
3
=
0
√
3
x
2
−
2
√
2
x
−
2
√
3
=
0
is ......................
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0%
32
0%
16
0%
-32
0%
-16
Out of the following_____________is not a quadratic equation.
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0%
2
x
2
+
√
6
x
−
6
=
0
2
x
2
+
√
6
x
−
6
=
0
0%
x
(
3
x
+
2
)
=
(
x
+
2
)
(
x
−
1
)
x
(
3
x
+
2
)
=
(
x
+
2
)
(
x
−
1
)
0%
x
(
x
−
2
)
+
3
=
x
2
+
3
x
(
x
−
2
)
+
3
=
x
2
+
3
0%
(
x
+
2
)
(
x
−
3
)
=
0
(
x
+
2
)
(
x
−
3
)
=
0
What is the standard form of quadratic equation
9
=
−
x
2
+
13
x
?
9
=
−
x
2
+
13
x
?
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0%
x
2
+
y
=
13
x
x
2
+
y
=
13
x
0%
x
2
+
13
x
−
y
=
0
x
2
+
13
x
−
y
=
0
0%
x
2
+
13
x
−
9
=
0
x
2
+
13
x
−
9
=
0
0%
−
x
2
+
13
x
−
9
=
0
−
x
2
+
13
x
−
9
=
0
0:0:2
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