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