Question 1050567
If a&#916;b means 2ab+5 when a < b and 2b-a when a>=b , evaluate (3&#916;9)&#916;5.
<pre><b>
First we do what's in the parentheses, which is 3&#916;9

3&#916;9 a case of a&#916;b when a < b since a=3 < b=9, so we use 2ab+5,
and get 2(3)(9)+5 = 59

So we replace the (3&#916;9) by 59 in (3&#916;9)&#916;5 and have 59&#916;5

59&#916;5 a case of a&#916;b when a &#8805; b since a=59 &#8805; b=5, so we use 2b-a,
and get 2(5)-59 = 10-59 = -49.

Edwin</pre></b>