please help this newton method, thanks

QUESTION 4 A sales company is starting a new venture. A business analyst has formulated a mathematical model to predict the company's revenue, R (in thousands of dollars) at any time t (in years) where R(t) = 63x3 - 200x* + 100x + 5 and the company's expenses E, (in thousands of dollars) at any time t (in years) where E(t) =28x3 + 12x + 13 Find the break even points and determine when a profit will be generated. Explain reasons clearly. (15 marks)