Should the answer to x^2= 4 be x = 2 and x = - 2 or just x= 2? What about x^4 = 81? Also, what about cube root of a negative number?

yes the answer of x^{2}=4 shall be x=2 and x=-2

same for x^{4}=81 x shall be 3 and -3

but if √4 is asked answer would only be 2.

or 4√81 is only 3

the reason being x^{2} is a quadratic function therefore it will have 2 roots

whereas √x will only have 1 answer

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