1.
Use the quadratic formula to solve 2
x
2
+ 7
x
+ 4 = 0. Approximate the solutions to the nearest hundredth.
A.
-2.78, -0.72
B.
-3.35, -0.15
C.
1.28, 3.66
D.
-5.56, -1.44
Hint
2.
Which method of solving quadratic equations is best suited for the equation
x
2
– 18
x
= 0
A.
quadratic formula
B.
factoring
C.
completing the square
D.
graphing
Hint
3.
How many real roots exist if the discriminant of the equation = 0?
A.
1
B.
2
C.
cannot be determined from given information
D.
0
Hint
4.
How many real roots are there for the equation 2
x
2
+ 6
x
+ 3?
A.
0
B.
1
C.
2
D.
cannot be determined from given information
Hint
5.
Which of the following equations will have exactly 1 real root?
A.
x
2
– 6
x
– 9
B.
9
x
2
+ 12
x
– 4
C.
4
x
2
– 8
x
+ 4
D.
2
x
2
+ 5
x
– 16
Hint