Question 1177588
A = 2X^2 - NX - X 

Combining like terms, we get:

A = 2X^2 - (N+1)X

Now, we can isolate X by moving the constant term to the right side of the equation:

A + (N+1)X = 2X^2

And then dividing both sides by 2

(X^2) / 1 = (A + (N+1)X) / 2

Taking the square root of both sides, we get:

X = +/- sqrt[(A + (N+1)X) / 2]