Practice Page
Directions: Solve the following questions, using the quadratic formula and the discriminant. Be sure to show your work. Use calculator only for checking.
1.
Solve using the quadratic formula:
            2x2 +5x - 3 = 0
spy1
       Choose:
 
x = -½;   x = 3
x = ½;   x = 3
  x = ½;   x = -3 x = -½;   x = -3

 

 

2.
Which number is the discriminant of a quadratic equation whose roots are real, unequal, and irrational?
ninja2
       Choose:
 
-7
0
 
6
16

 

3.
Solve using the quadratic formula:
         
spy3
       Choose:
 
 

 

 

4.
How many real number solutions does
2x2 + 3x + 6 = 0 have?
ninja6
       Choose:
 
one
two
 
zero
infinitely many

 

 

5.
Solve using the quadratic formula:
            x2 + 25 = 0
spy2
       Choose:
 
± 5
+5 only
  ± 5i + 5i only

 

 

6.
The roots of quadratic equation are real, irrational, and unequal. Which choice could be the value of the discriminant?
ninja1
       Choose:
 
-5
0
 
1
3

 

7.
Solve using the quadratic formula:
            9x2 - 6x +1 = 0
spy4
       Choose:
 
  qf4dd

 

 

8.
Which equation has roots that are real, rational, and equal?
ninja7
       Choose:
 
x2 - 3x + 10 = 0
x2 + 6x + 5 = 0
 
x2 + 4x + 4 = 0
x2 + 4x + 5 = 0

 

 

9.
Solve using the quadratic formula:
          0 = -16t2 + 30t + 35
Round final answer(s) to the nearest tenth.
spy5
       Choose:
 
t = -0.8 or 2.7
t = -1.2 or 4.6
  t = -0.6 or 2.4 t = -1.1 or 4.2

 

 

10.
If the graph of a parabola, such as
y = ax2 + bx + c, does not intersect the x-axis, which choice is true?
ninja5
       Choose:
 
b2 - 4ac = 0
b2 - 4ac < 0
 
b2 - 4ac > 0
b2 - 4ac < 0



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