Question 921154
sqtrt(X) +144 =x+6
   substrat  144 on both sides
  sqrt(x) +144-6 =x+6-6
    sqrt(x) +138=x
    sqrt(x)=x-138
  squaring on both sides
 sqrt(x)*sqrt(x)  = (x-138)*(x-138)
              x =  x(x-138)-138(x-138)
              x = x^2 -138*x-138*x -138*(-138)
              x = x^2 -138x-138x+19044
               x =x^2 -276x+19044
                 subtract x on both sides
                      x-x =x^2 -276x+19044-x
                       0=x^2-275x+19044
*[invoke quadratic "x", 1, -275, 19044 ]