math

classic Classic list List threaded Threaded
2 messages Options
CTHook CTHook
Reply | Threaded
Open this post in threaded view
|

math

Solve 8x+3=-4x^2 by using the quadratic formula.  
Captain Smart Captain Smart
Reply | Threaded
Open this post in threaded view
|

Re: math

8x + 3 = -4x²
4x² + 8x + 3 = 0   added 4x²

a = 4, b = 8, c = 3

-8 ± √[8² - 4(4)(3)]
------------------------
           2(4)

-8 ± √(64 - 48)
------------------
          8

-8 ± √16
-----------
     8

-8 ± 4
--------
   8

-4          -12
---  or   -----
 8           8

=  -1/2  or  -3/2

~Captain Smart~