the example of an open equation is :x+9=16
Rewrite it in the form; a^2 - b^2, where a = 5x and b = 6
(5x)^2 - 6^2
Use the Difference of Squares: a^2 - b^2 = (a + b)(a - b)
<u>(5x + 6)(5x - 6) </u>