Need help: Questions number 15 and 16 from College Algebra CLEP Study Guide

[Goku1]

I'm not looking for answers. I'm just looking for someone to show me, step by step, how to solve these two College Algebra math problems. I usually ask on this section of OSBot for these specific questions and I end up learning fairly quickly with one simple example. I'm giving Likes for the people that can do this. ;p

 

The math problems are listed in the link below:

http://puu.sh/aOIKR/9c19433b2b.png

 

 

Edited August 12, 2014 by Goku1

[Pecman]

Is this college level? I swear i took this in 11th grade.

[Anaesthetic]

Are these really college level problems?  I remember taking stuff like this last year (10th grade)

[Goku1]

Is this college level? I swear i took this in 11th grade.

 

 

Are these really college level problems?  I remember taking stuff like this last year (10th grade)

Ye, both of them I took in High School as well and am in need of just a reminder of solving them.

[winnerowns]

http://www.algebra.com/algebra/homework/quadratic/Quadratic_Equations.faq.question.227633.html

[Goku1]

http://www.algebra.com/algebra/homework/quadratic/Quadratic_Equations.faq.question.227633.html

This helped me solve question 16. Any help with question 15?

[winnerowns]

This helped me solve question 16. Any help with question 15?

Im really not sure how to explain this, but im 95% sure answer is a<0 and b>0

[Goku1]

I see. Does anyone have an example or formula on how to solve question 15?