Posted by cal on Tuesday, October 7, 2008 at 3:34pm.
I HAVE THESE ANSWERS FOR THE PROBLEMS. COULD YOU DOUBLE CHECK PLEASE, THIS IS A PRACTICE QUIZ WHICH ISN'T A GRADE IT JUST HELPS ME GET READY FOR THE TEST.
1) a
2) b
3) d
4) a
5) d
1. Solve x^3 + 6x^2 + 13x + 10 = 0.
a) –2 + 2i, –2 –2i, –2
b) 2 + i, 2 – i, –2
c) –2 + i, –2 – i, –2
d) 2 + 2i, 2 – 2i, –2
2. Find the discriminant and describe the nature of the roots of 3x^2 + 6x + 3 = 0.
a) The discriminant is 0 and there is/are one real root.
b) The discriminant is 4 and there is/are one real root.
c) The discriminant is 0 and there is no real root.
d) The discriminant is 7 and there is/are one real root.
3. Use the remainder theorem to find which of the following is not a factor of x^3 + 12x^2 + 47x + 60.
a) x + 5
b) x – 5
c) x + 4
d) x + 3
4. List all the rational roots of f(x) = 24x^3 – 10x^2 – 7x + 2.
a) 1/2, 1/4 ,2/3
b) 2/3,1/4 ,2/3
c) 1/2,1/3,1/2
d) 2/3,1/2,1/4
5. Use the rationalroot theorem to find the roots of 12x^3 – 8x^2 – 3x + 2 = 0.
a) 2/3,1/2,1/4
b) 2/3,1/2,1/2
c) 1/2,1/2,1/4
d) 2/3,1/3,1/3

math  bobpursley, Tuesday, October 7, 2008 at 4:02pm
The first two are wrong, I will check the others later.

math  bobpursley, Tuesday, October 7, 2008 at 4:25pm
3 is wrong, 4 is right, 5 is wrong
Answer This Question
Related Questions
 Geometry B: Unit 3: Similarity Lesson5 Practice  If you have done this please ...
 English  You are going to have a short quiz. I will hand out exam papers to you...
 sra McGuin  Just wanted to thank you for all of your help   will need help ...
 chemistry  what is the total number of electrons shared in a double covalent ...
 Math Geometry  Unit 1 Lesson 5: Drawing Triangles Quiz if some knows what the ...
 Science 7R  Tomorrow I have a science test on circulatory system and is there a...
 English  Formative Test Now, let's check how well you can use the expressions ...
 math  A math teacher calculates grades as follows:Grade=[2 test averages+quiz ...
 English  I just wanted to be sure about the position of the conjunctions. Could...
 french 2  I have a quiz monday on the verb VINIR, and on the quiz we have to ...
More Related Questions