This week in math I learned how to factor binomials with perfect squares. To factor one, one of the terms has to have a negative.

For example: 36x^2 – 9^2

To solve this, first you would need to take the square root of 36 and x in the beginning of both brackets-> (6x    )(6x     )

Then you would put the square root of 9 at the end of the brackets-> (6x   3 )(6x   3)

In between the two, one sign needs to be positive and one needs to be negative so that they cancel out-> (6x + 3 )(6x – 3)

You can always FOIL your answer to check if it’s right.

 

More examples: