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 x2=4 shall be x=2 and x=-2
same for x4=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 x2 is a quadratic function therefore it will have 2 roots
whereas √x will only have 1 answer
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