Question

If `x^2=-4`,what is the value of `x`?(There should not exist any imaginary number)

Answer 1

There would be no such value of `x`,

Explanation:

`x^2=-4`

Square root both sides,

`x=+-sqrt(-4)`

Separate `-4`,

`x=+-sqrt(-1)*sqrt4`

Solve,

`x=+-2i`