Final answer:
The expression (2 x 7) x 3 simplifies to 14 x 3, which equals 42. The given rules of exponentiation are not applicable to this expression as it involves only multiplication and not powers.
Step-by-step explanation:
The expression (2 x 7) x 3 can be simplified using the rule of exponentiation and multiplication, specifically xPx9 = x(p+q), which means when you multiply two powers with the same base, you add the exponents. However, in this case, we are performing a straightforward multiplication, not dealing with exponents. By carrying out the operations within the parentheses first due to the order of operations, we then find the expression is equivalent to:
14 x 3, which simplifies to 42.
Another relevant rule from the reference material is (xa)b = xa.b, which applies to situations where an exponentiated quantity is raised to another power, but this is not applicable here since we don't have any exponents in our problem.