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ECAT Mathematics Chapter 6 Quadratic Equations Online Test MCQs With Answers
Question # 1
If a polynomial p(x) is divided by x-c, then the remainder is
Choose an answer
p(x)
x-c
c
P(c)
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Question # 2
If ax
2
+ bx + x = 0 is satisfied by every value of x, then
Choose an answer
b = 0, c = 0
c = 0
b = 0
a = b = c = 0
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Question # 3
In quadratic equation f(x) = ax
2
,if a >0, then the graph of parabola
Choose an answer
Opens up
Opens down
close up
symmetric w.r.t.x.axis
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Question # 4
The roots of ax2 + bx + c = 0 are always unequal if
Choose an answer
b2 - 4ac = 0
b2- 4ac ≠ 0
b2- 4ac > 0
b2- 4ac ≥ 0
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Question # 5
Choose an answer
(-1, 2)
(-1, 1)
(1, 2)
{-1}
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Question # 6
If x
3
- x
2
+ 5x
+ 4 is divided by x - 2, then the reminder is
Choose an answer
0
2
18
14
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Question # 7
Ifα,β are non-real roots of ax2 + bx +c =0 (a,b,c∈ Q),then
Choose an answer
α = β
αβ = 1
α = β
α = 1
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Question # 8
If x - 2 is a factor of ax2- 12x + a = 2a, then a = ______
Choose an answer
-5
5
0
1
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Question # 9
Roots of the equation 2x
2
- 7x + 3 = 0 are
Choose an answer
Rational
Irrational
Complex
None of these
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Question # 10
In a quadratic equation with leading co-efficient 1, a student reads the co-obtain the roots as - 15 and -4. The correct roots are
Choose an answer
6, 10
-6, -10
8, 8
-8, -8
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Question # 11
If one root of the equation ix
2
- 2(i + 1) x +(2 - i) = 0 is 2 - i, then the other root is
Choose an answer
-i
2 + i
i
2 - i
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Question # 12
Roots of the equation 9x
2
- 12x + 4 = 0 are
Choose an answer
Real and equal
Real and distinct
Complex
None of these
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Question # 13
if one root of the equation ix2 - 2(i + 1) x +(2 - i)= 0 is 2 - i then the other root is
Choose an answer
-i
2 + i
i
2 - i
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Question # 14
Sum of all the four forth roots of unity is
Choose an answer
1
-1
i
0
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Question # 15
w
29
= ______
Choose an answer
0
1
w
w
2
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Question # 16
(x-1) is a factor of
Choose an answer
2x
3
-3x
2
+9
2x
3
-5x-8
48x
2-
46x-9
x
9
-1
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Question # 17
If the roots of x
2
+ ax + b = 0 are non-real, then for all real x, x
2
+ ax + b is
Choose an answer
Negative
Positive
Zero
Nothing can be said
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Question # 18
If 3x
4
+ 4x
3
+ x - 5 is divided by x + 1, then the reminder is
Choose an answer
0
7
-7
5
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Question # 19
The graph of the quadratic equation is
Choose an answer
Straight line
Circle
Parabola
elipse
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Question # 20
Find a if 1 is a root of the equation x
2
+ ax + 2 = 0
Choose an answer
3
-3
2
0
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Question # 21
If sin
α
and cos
α
are the roots of the equation px
2
+ qx + r =0, then
Choose an answer
p
2
- q
2
+ 2pr = 0
(p + r)
2
= q
2
- r
2
p
2
+ q
2
- 2pr = 0
(p - r)
2
= q
2
+ r
2
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Question # 22
The minimum value of the quadratic function f(x) = 5 x 2-11,is
Choose an answer
7
-7
6
-11
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Question # 23
x
4
- 3x
3
+ 3x + 1 = 0 is called ______
Choose an answer
Reciprocal equation
Exponential equation
Radical equation
None of these
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Question # 24
Choose an answer
Only one real solution
Exactly three real solution
Exactly one rational solution
Non-real roots
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Question # 25
The set of real roots of the equation log
(5x + 4)
(2x +3)
3
- log
(2x + 3)
(10x
2
+ 23x + 12) = 1 is
Choose an answer
{-1}
{-3/5}
Empty set
{-1/3}
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Question # 26
(x +a)(x +b)(x +c)(x +) = k, k≠0 is reducible to quadratic form only if
Choose an answer
a+b=c+d
a+c=b+d
a+d=b+c
All are correct
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Question # 27
If ax + bx + c =0 is satisfied by every value of x,then
Choose an answer
b = 0,c = 0
c = 0
b = 0
a = b = c = 0
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Question # 28
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Question # 29
The quadratic formula is
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Question # 30
The sum of the roots of the equation x2 -6x +2 = 0 is
Choose an answer
-6
2
-2
6
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Question # 31
The maximum value of the quadratic function f(x) = -2x2+20x,is
Choose an answer
4
3
50
7
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