to avoid a negative square root, how can i use the square root property on this ? (x+81)^2 = -158 or am i missing something about the rules of negative numbers and square roots ? I thought negative square roots were not allowed. thanks :)

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If we allow only Real Numbers, we stop in our tracks and say, "No Solution".

in math if it is a negative number we call it the number I because it is imaginary which is why we write something like this sqrt -158i if not allowed than no solution..

Negative numbers result in imaginary numbers. Imaginary numbers scare me.

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