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