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This equation can be written as :

n² + n = 30 : n² + n - 30 = 0

This can be factored :- (n - 5)(n + 6) = 0

This gives two solutions, x = 5 [25 + 5 = 30]

and x = -6 [36 - 6 = 30]

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Q: The sum of an integer and its square is 30 find the number?
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