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Mathematics ECAT Pre Engineering Chapter 6 Quadratic Equations Online Test MCQs With Answers
Question # 1
A polynomial of arbitrary degree
Choose an answer
f(x) = o
f(x) = x
f(x) = a
f(x) = ax + b,a ≠ 0
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Question # 2
Ifα,β are non-real roots of ax2 + bx +c =0 (a,b,c∈ Q),then
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α = β
αβ = 1
α = β
α = 1
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Question # 3
The graph of a quadratic function is
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Circle
Ellipse
Parabola
Hexagon
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Question # 4
If a polynomial P(x) is divided by x + a, then the remiander is
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P(a)
P(-a)
P(0)
None of these
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Question # 5
If a (p + q)
2
+ bpq +c = 0 and a (p + r)
2
+ 2 bpr + c = 0, then qr equals
Choose an answer
p
2
+ c/a
p
2
+ a/c
p
2
+ c/a
p
2
- c/a
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Question # 6
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Polynomial of degree 0
Polynomial of degree 1
Polynomial of degree 2
Polynomial of degree n
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Question # 7
If a polynomial p(x) is divided by x-c, then the remainder is
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p(x)
x-c
c
P(c)
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Question # 8
Roots of the equation x
2
- x = 2 are
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{2, -1}
{1, 0}
{2, 1}
{-2, 1}
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Question # 9
The condition for ax2 + bx c to be expressed as the product of linear polynomials is
Choose an answer
b4 - 4ac =0
b4- 4ac ≥0
b4- 4ac <0
b4= 4ac
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Question # 10
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 # 11
The roots of (b-c)x2+(c-a) x+a-b=0 are equal if
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2b = a+c
2a = b+c
2c = a+b
a + b + c =0
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Question # 12
Two quadratic equation in which xy term is missing and the coefficients of x
2
and y
2
are equal, give a linear equation by ______
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Addition
Subtraction
Multiplication
Division
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Question # 13
Which of the following is factor of x11+a11, where n is an odd integer
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x-a
x+a
2x-a
2x+a
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Question # 14
If w+w2 is a root of (x+1)(x+2)(x+3)(x+4) = k, then
Choose an answer
k=0
k=1
k=w
k=w2
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Question # 15
The roots of the equation ax
2
+ bx + x = 0 are real and distinct if
Choose an answer
b
2
- 4ac <0
b
2
- 4ac = 0
b
2
- 4ac > 0
None of these
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Question # 16
A polynomial P(x)has a factor (x-a)if P(a) =
Choose an answer
a
x
1
0
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Question # 17
If
α
,
β
are the roots of ax
2
+ bx + c = 0 and
α
+ h,
β
+ h are the roots of px
2
+ qx + r=0, then h =
Choose an answer
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Question # 18
If a,β are the roots of the equation x2 + kx +12 = 0 such that a - β = 1, the value of k is
Choose an answer
0
±1
±5
±7
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Question # 19
In quadratic equation y=ax
3
+bx+c, if b and c are both zero then the graph is
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Symmetric w.r.t.y-axis
Symmetric w.r.t.x-axis
Straight Line
Circle
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Question # 20
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 # 21
The roots of the equation ax
2
+ bx + c = 0 are complex/imaginary if
Choose an answer
b
2
- 4ac < 0
b
2
- 4ac = 0
b
2
- 4ac > 0
None of these
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Question # 22
If x - 1 is a factor of x4 - 5x2 + 4 then other factor is
Choose an answer
(x + 2)2(x - 1)
(x + 2)(x - 1)2
(x+2)(x2- x- 2)
(x + 2)2(x - 1)2
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Question # 23
If a > 0,b > 0, c > 0 then the roots of the equation ax2+ bx + c =0 are
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Real and negative
Non-real with negative real parts
Real and positive
Nothing can be said
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Question # 24
If w is a cube root of unity then 1 + w + w
2
= ______
Choose an answer
1
2
0
-1
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Question # 25
The roots of the equation 2
2x
- 10.2
x
+ 16 = 0 are
Choose an answer
2, 8
1, 3
1, 8
2, 3
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Question # 26
Roots of the equation x
2
+ 7x + 12 = 0 are
Choose an answer
{3, -4}
{-3, 4}
{3, 4}
{-3, -4}
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Question # 27
If x
3
+ 4x
3
- 2x +5 is divided by x - 1, then the reminder is
Choose an answer
8
6
4
None of these
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Question # 28
If x-2 and x-1 both are factors of x
3
-3x
3
+2x-4p, then P must equal to
Choose an answer
1
2
0
-2
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Question # 29
Choose an answer
Two real roots
Two positive roots
Two negative roots
One positive and one negative root
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Question # 30
Choose an answer
Polynomial of degree 0
Polynomial of degree 2
Quadratic equation
None of these
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Question # 31
(2 + w) (2 + w
2
) = ______
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1
2
3
0
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