SOLUTION: it says to solve the equation. I am stuck on this problem. 21z^2+85z-26=0 If you could tell me how to do this It would be great. I have figured out others but I am really stu

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: it says to solve the equation. I am stuck on this problem. 21z^2+85z-26=0 If you could tell me how to do this It would be great. I have figured out others but I am really stu      Log On


   

Question 414749: it says to solve the equation. I am stuck on this problem.
21z^2+85z-26=0
If you could tell me how to do this It would be great. I have figured out others but I am really stuck on this one.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

solving using the Quadratic Formula:  x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+

21z^2+85z-26=0

x+=+%28-85+%2B-+sqrt%28+9409%29%29%2F%2842%29+ 

x+=+%28-85+%2B-+97%29%29%2F%2842%29+ 

  x = -182/42      x = 12/42

  x = -4  1/3      x = 6/7 = .8571