The answer to the question below is x = 7. How does one get 7 in this sample question?
sqrt{5x + 1} + 3x = 27
Square both sides.
Use the quadratic formula:
And you end up with or
One slight problem there is that 104/9 is completely wrong as you can tell by putting it in. However, 7 fits perfectly and is the only real solution as far as I can tell.
Last edited by JeWiSh; March 8th 2009 at 02:41 PM.
One slight problem there is that 104/9 is completely wrong as you can tell by putting it in. However, 7 fits perfectly and is the only real solution as far as I can tell.
I was going to use the quadratic formula but decided not to.