Consider that the age x of a unicorn in human equivlant years can be given by the formula f(x)=0.097326x^3-1.3367^2+12.46+3.914. When a unicorn is 2.5 years old, what is its age in human equilvant years. 12years old

You seem to have omitted some x^2 and x symbols in your equation.

Is this a home schooling question? Just curious.