Casio FX-115MS bug

[Albert Chan]

Solving roots reciprocal, with coefficients in reversed order :

X³ + 11 X - 1000100 = 0

Let x = 100/X, above turns to -1.0001 x³ + 0.0011 x² + 1 = 0
Cubic Solver get x = 1.000333299, X = 100/x = 99.96668121

Doing the same for Y=X-100, y=1/Y, solved X is even better:
Y³ + 300 Y² + 30011 Y + 1000 = 0 => 1000 y³ + 30011 y² + 300 y + 1 = 0
Cubic Solver get y = -30.00100144, X = 100 + 1/y = 99.96666778

Of course, since Y ~ 0, we could just iterate Y = (Y³ + 300 Y² + 1000) ÷ -30011
We have Y = 0 -> -0.033321115 -> -0.033332213 -> -0.03333222 (converged)
X = 100 + Y = 99.96666778