Finding the Square of a Binomial with One Variable

Now, let's consider squaring a binomial. This can be done using the FOIL method from earlier in this unit or by using a formula. Many students fall into a trap with this type of problem. This video starts with this trap and why it doesn't work. Pay close attention to this explanation. Then, notice how the problem is solved correctly using the FOIL method and the formula. You can choose which method you like better for these problems.