Question 130747
Given:
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{{{(a-b)^3}}}
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You are asked to evaluate this when a = 3 and b = 4. So all you need to do is replace a with 3
and replace b with 4. 
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When you make these two substitutions the problem then becomes:
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{{{((3)-(4))^3}}}
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Combine the two terms inside the parentheses by subtracting 4 from 3 to get -1. This reduces the
problem to:
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{{{(-1)^3}}}
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You then cube -1 by multiplying it by itself three times ... -1 times -1 times -1. If you
do that multiplication you get -1 as the answer.
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So the answer to this problem is that when a = 3 and b = 4 then:
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{{{(a-b)^3=(3 - 4)^3 = (-1)^3 = -1}}}
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Hope this helps you to understand the problem.
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