SOLUTION: A binary operation is defined as p*q=3p-q. Evaluate (1*2)*3

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Question 1186609: A binary operation is defined as p*q=3p-q. Evaluate (1*2)*3
Found 2 solutions by MathLover1, ikleyn:
Answer by MathLover1(20850) About Me  (Show Source):
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A binary operation is defined as p%2Aq=3p-q. Evaluate %281%2A2%29%2A3
%281%2A2%29%2A3=>p=%281%2A2%29=2 and q=3
Substitute p=+2, q=+3+into the formula
%281%2A2%29%2A3=3%281%2A2%29-3=6-3=3

Answer by ikleyn(52794) About Me  (Show Source):
You can put this solution on YOUR website!
.
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.    ANSWER

Solved.