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The difference of two sets A and B , to be denoted by A-B, is the set of all those elements which belong to A but not to B
Assuming that a and b are two non-negative numbers, then their sum is a + b and the difference is |a - b|.
That's the difference of the monomials' squares. If the two numbers are "a" and "b" then (a + b)(a - b) = a^2 - b^2 where ^ means "to the power of".
It depends what you mean.a2-b2 is the difference of two squares so it equals (a-b)(a+b) (a-b)2=a2-2ab+b2if your question is a difference of squares and it looks like (a-b)^2, then your answer is (a+b)(a-b).
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