SOLUTION: The sum of a number and its square is 72. Find the number.

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Question 163539This question is from textbook
: The sum of a number and its square is 72. Find the number. This question is from textbook

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Call the number N.
N%2BN%5E2=72
N%5E2%2BN-72=0
%28N%2B9%29%28N-8%29=0
Two solutions.
N%2B9=0
N=-9
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N-8=0
N=8
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Check your answers.
-9%2B81=72
72=72
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8%2B64=72
72=72
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Both answers lead to true statements.
Both answers are good answers.