1. The problem statement, all variables and given/known data 1. A point mass m1= 2kg is at the origin and a second point mass m2=4kg is on the x axis at x=6m. Find the point on the x axis for which g=0 2. Relevant equations g= -Gm/r^2 3. The attempt at a solution So g=0 means that g1+g2=0. I set up that 2(r2)^2= -4(r1)^2 and made r2=x-6 and r1=x. Thus, I have a quadratic equation as x^2 -4x+12=0 which has no solution. I am wrong on this question. How should I fix this ??