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The square root of the sum of a number is 4 is 5. Find the number. What is it?
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3 votes
The square root of the sum of a number is 4 is 5. Find the number. What is it?

User Rick Liao
by
4.3k points

1 Answer

3 votes

Answer: 21

Explanation:


√(n+4)=5\\\\(√(n+4))^2=(5)^2\\\\n+4=25\\.\underline{\ \ -4\ \ -4}\\\boxed{n\quad \ =\ 21}

User Louis Brandy
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