The equation x^3 - 5x = 59has a solution between 4 and 5

Which expression is equivalent to the expression shown?

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?