Question 1186609
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A binary operation is defined as   p*q = {{{3p-q}}}.   Evaluate   (1*2)*3.
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We move from left to right and make operation in parentheses, first :


    (1*2) = {{{3}}}.{{{1}}} - {{{2}}} = 3 - 2 = 1.


using the definition.


Then we make next operation 


    (1*2)*3 = 1*3 = we use the definition, again = {{{3}}}.{{{1}}} - {{{3}}} = 3 - 3 = 0.    <U>ANSWER</U>
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Solved.