root-finding code snippets in javascript

write a matlab code based on bisection and false position methods to find the root of an equation. determine the root of 𝑓(𝑥) = −0.4𝑥^2 + 2.2𝑥 + 4.7 determine the root of 𝑓(𝑥) = (0.9−0.4𝑥)/𝑥 in javascript