I just began the course yesterday and am very new to this. The very first question "Positive root of the following equation:
34*x^2 + 68*x - 510" is giving me problems. After some research, I put in "positive_root = (34*x^2 + 68*x - 510)" but received the error that x is not defined. Dumb question I'm sure, but you have to start somewhere.

Question

I just began the course yesterday and am very new to this.  The very first question "Positive root of the following equation:
34*x^2 + 68*x - 510" is giving me problems.  After some research, I put in "positive_root = (34*x^2 + 68*x - 510)" but received the error that x is not defined.  Dumb question I'm sure, but you have to start somewhere.

anonymous · Answer

use descriminant formula-->x=(-b+math.sqrt(b**2+4*a*c)/2*a where a*x**2+b*x+c=0
remember there are two answers one written above another is the same exceppt we change sign -math.sqrt(...).Also don't forget to type    from math import *    .Hope it helps.

anonymous · Answer

Thanks so much. I will check it out and let you know.

anonymous · Answer

The other thing I notice is the error that x is not defined come from the fact that you used a variable before declaring it. You have to initialize x before using it in an expression.