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Math 11 Chapter 4
Quadratic equations
Test - 2
1.
When discriminant = 0 then the roots are………….
a) Irrational and unequal
b) None
c) Rational
d) Real and equal
2.
For S = sum of roots and P = product of roots the quadratic equation will be..
a) x
2
– Sx – P = 0
b) x
2
+ Sx – P = 0
c) x
2
- Sx + P = 0
d) x
2
+ Sx + P = 0
3.
A quadratic equation in x can be written in form………………?
a) ax2+bx+c = -1
b) ax2+bx+c = 1
c) ax2+bx+c = 0
d) ax2+bx+c = 2
4.
When b2 – 4ac is not a perfect square then the roots f ax2 + bx + c = 0 will
be…
a) Real and equal
b) Equal
c) Irrational
d) Rational
5.
9. ω and ω
2
are called ……………… cube roots of unity?
a) Cos c/2
b) Cos a/2
c) Cos b/2
d) Cos γ/2
6.
The sum of roots of ax
2
+ bx + c = 0 will be ………
a) -b / a
b) b / c
c) -c / a
d) c / a
7.
13. The product of all three cube roots of unity is ………………?
a) R = a / 2 Sin d
b) R = a / 2 Sin c
c) R = a / 2 Sin a
d) R = a / 2 Sin b
8.
If roots of the equation x2 + Rx + 1 = 0 are equal, the value of k will be…
a) 4
b) 0
c) 3
d) -4
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