- Thread starter Trapez
- Start date

this involves solving a fifth degree polynomial equation in B.Hi

I am stuck with re-arranging the formula to make B the subject matter. Any help is appreciated.

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in general, this is an impossible task

why do you need to make B the subject matter?

I see no way to make B the subject of the equation. However, since this is for an engineering class you should be able to use an approximation technique to calculate a value for B given values for I, w, L, E and f. You can use a technique such as Newton's method to iterate to an answer for B to whatever accuracy desired. Are you familiar with this technique? If not, see Calculus I - Newton's Method and post back with any further questions.