Note that {{MATH_108}} Our limit is, again, of the form {{CMD_109}}{{CMD_110}}and we can probably factor a term going to {{MATH_111}} out of both the numerator and denominator. We suspect from looking at the denominator that this term is {{MATH_112}}. Unfortunately, it is not immediately obvious how to factor an {{MATH_113}} out of the numerator. We will use an algebraic technique called {{CMD_114}}. This technique is useful when you are trying to simplify an expression that looks like {{MATH_115}} It takes advantage of the difference of squares rule {{MATH_116}} In our case, we will use {{MATH_117}} and {{MATH_118}}. Write {{MATH_119}} {{ENV_120}} {{CMD_121}} {{CMD_122}}