Graph x^3-x^2-2x=0 what are the solutions of the equation

Really need on these. i have no idea what to do

Let w=23 . what is the value of w + 45 ?

Svetlana's hair is 4 4 centimeters ( cm cm) long. her hair grows 1 . 5 cm 1.5cm per month. svetlana wants her hair to be less than 1 6 cm 16cm long. write an inequality to determine the number of months, m m, svetlana can allow her hair to grow so that it is less than 1 6 cm 16cm long.