1.
Use the quadratic formula to solve 6
x
2
-
x
- 1 = 0.
A.
B.
C.
D.
Hint
2.
Use the quadratic formula to solve 2
x
2
+ 7
x
+ 4 = 0. Approximate the solutions to the nearest hundredth.
A.
1.28, 3.66
B.
-5.56, -1.44
C.
-2.78, -0.72
D.
-3.35, -0.15
Hint
3.
Which method of solving quadratic equations should be used when only an estimated solution is necessary?
A.
quadratic formula
B.
factoring
C.
graphing
D.
completing the square
Hint
4.
How many real roots exist if the discriminant of the equation = 0?
A.
0
B.
2
C.
cannot be determined from given information
D.
1
Hint
5.
How many real roots are there for the equation 2
x
2
+ 6
x
+ 3?
A.
cannot be determined from given information
B.
2
C.
1
D.
0
Hint