Root Finding with False Position Method

I have to try solving an equation with false position method but ı dont know how can ı start ( what is my function)? If anyone help me ı will be so greateful. Thanks

Equation iS

Answer 1

[Matt J]

Hint: Given two points (a,f(a)) and (b,f(b)), one way to find the next point c is,

c=roots(    polyfit( [a,b], [f(a),f(b)] , 1)   )