how do i solve for x ... with excel preferbly.

0=4x^3x2.14x10^-4x^2+2.0x10^-9x-3x10^-11
thanks!

Is this an exponential equation or is this a polynomial?

It is not clear which is the variable x and which is the multiplication sign.
Could you repost with the multiplication signs shown as "*" instead of x.
Also, this part is not clear, is an operator missing?
4x^3x2.14x10^-4x^2