### MATH 100: Polynomial Solving Worksheet

While studying differentiation in calculus, you will be asked repeatedly to calculate when an expression
equals zero. Complete the problems on this worksheet to prepare yourself for calculus; you will be asked to
work one of the problems at the board during Coaching.

- Solve for x: x
^{2} - x - 20 = 0

- Check your work on the previous problem by plugging your answers back into the original equation.

- Find all values of x for which x
^{2} + 7x + 12 = 0.

- Check your work on the previous problem by using a calculator to plug your answers back into the original equation.

- Find the x-intercepts of the graph of the equation x
^{3} - 2x^{2} - 48x = 0.

- Check your work on the previous problem. If you used algebra to solve the problem, check your work by graphing. If you used a graph to solve the problem, check your work algebraically.