Which of the following is the discriminant of the equation 3x2 + 2x - 1 = 0?
8
-8
12
16
The middle term of the expansion of ( x/y + y/x )8 is ____________.
8c3
8c4
8c5
8c6
The discriminant of the quadratic equation ax2 + bx + c is ________.
b2 + 4ac
b2 - 4ac
4ac
2b - 4ac
If p and q are the roots of x2 + 8x + 15 = 0. Then the value of p2 + q2 is ___________.
64
30
34
48
If α, β are the roots of a quadratic equation ax2 + bx + c, then α + β is ________.
a
a/b
-b/a
c/a
The quadratic equation whose roots are √3 and -√3 is _________.
x2 - 3x + 1 = 0
x2 + 3x + 3 = 0
x2 + 3 = 0
x2 - 3 = 0
If 1 is a root of the equation x2 - 5x + p = 0, then other root is _____.
5
6
4
2
The product of the roots of the equation x2 - 4x + 7 = 0 is __________.
7
One root of the equation x2 - 3x + p = 0 is -2. Then value of p is _________.
10
-10
-2
If the discriminant of x2 - mx + n = 0 is zero. Then the solution is _____.
-m/2
-m
m/2
m
