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Use the formula (n2 + 7) - n2 = 7, expand the equation to get

n2 + 7n + 7n + 49 - n2 = 7, eliminate what you can to get 14n + 49 = 7, then isolate 'n' by subtracting 49 from both sides of the equation which will now be 14n = -42, now you divide both sides of the equation by 14 to get n = -3.

Since 'n' is squared, you know that the two possible combinations of numbers can be either positive or negative. Their equation will look like this;

16 - 9 = 7, or 42 - 32 = 7, or (-42) - (-32) = 7.

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15y ago

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