Question 993526

trouble solving this... 

2 1/2 + 3/4 times 2 1/2 - 3/4   I know the answer is  5 11/16 but I dont know how my teacher did this...can you show me step by step?

Thank you!
<pre>Why would someone try to help you and not care about getting the answer you supplied? That's so ridiculous!!
{{{(2&1/2 + 3/4) * (2&1/2 - 3/4)}}}
{{{(5/2 + 3/4) * (5/2 - 3/4)}}}
{{{(10/4 + 3/4) * (10/4 - 3/4)}}} ------ Changing fractions to LCD, 4
{{{(13/4) * (7/4)}}}________{{{91/16}}}, or {{{highlight_green(5&11/16)}}}