Answer:
40 is the answer . is it right or Not?
Zero is equal to its negative
The domain for all variables of the set of nonnegative integers given is true.
<h3>How to explain the truth value?</h3>
From the information given, we are given ∃n∀m(m< n). This implies that for all m, there exists n such that m × n where m and n are non negative integers.
This statement is true because for any non negative integer, the least value is zero and the set is unbounded.
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Answer:
Expand 
Step-by-step explanation:

Apply the distributive law: 


Apply minus - plus rules:


Multiply the numbers: 

Hope this helps! If so, may I get Brainliest and a Thanks?
Thank you, have a good one! =)