1 |
Sum of roots of ax2 + bx + c = 0 is equal to product of roots only if: |
a+c=0
b+c=0
a+b=0
a+b+c=0
|
2 |
Four fourth roots of 625 are: |
±5,±5i
±5,±25i
±25,±25i
none of these
|
3 |
|
none of these
|
4 |
|
4
16
8
64
|
5 |
|
1
0
2
3
|
6 |
|
i
|
7 |
If one root of 2x2 + ax + 6 = 0 is 2 then the value of a is: |
7
-7
|
8 |
A numbers exceeds its square root by 6, the number is: |
6
3
9
none of these
|
9 |
Solution set of the simultaneous equations : x + y = 1, x - y = 1 is: |
{(0,0)}
{(1,0)}
{(0,1)}
{(1,1)}
|
10 |
Equations having a common solution are called: |
linear
quadratic
homogeneous
simultenaeous
|
11 |
The roots of the equation 25x2 - 30x + 9 = 0 are; |
rational
irrational
equal
complex
|
12 |
In ax2 + bx + c = 0, if b2 - 4ac > 0 and perfect square the roots are: |
rational
irrational
equal
complex
|
13 |
For what value of k, the roots of the equation x2 + √k x + 2 = 0 are equal: |
1
8
2
4
|
14 |
If the Discriminant of a quadratic equation is a perfect square, then roots are: |
real and equal
complex
rational
irrational
|
15 |
|
linear equation
Quadraticequation
cubicequation
radicalequation
|
16 |
If the sum of the roots of ax2 - (a + 1) x + (2a + 1) = 0 is 2, then the product of the roots is: |
1
2
3
4
|
17 |
If the roots of x2 - bx + c = 0 are two consecutive integers, then: b2 - 4ac = |
0
1
-1
2
|
18 |
For what value of k, the sum of the roots of the equation x2 + kx + 4 = 0 is equal to the product of its roots: |
±1
4
±4
-4
|
19 |
If the sum of the roots of the equation kx2 - 2x + 2k = 0 is equal to their product, then the value of k is: |
1
2
3
4
|
20 |
The ration of the sum and product of roots of 7x2 - 12x + 18 = 0 is: |
7:12
2:3
3:2
7:18
|