If $x^3=-27$ ,then what is x?

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Answer 1 · 2018-04-23T22:55:47

$x=-3$

$x^3=-27$
$x^3=-3^3$
$x=-3$

Answer 2 · 2018-04-23T23:23:30

$x=-3$

We can take the cube root of both sides, which is the same as raising both sides to the $1/3$ power. Thus, we have:

$x=root3(-27)$

which evaluates to

$x=-3$ (the number in the radical is negative, and we have an odd-numbered root, so our answer must be negative).

If you can solve $x^3=27$ , you can easily find $x^3=-27$ , because the only thing that'll change is the sign of the answer. It will become negative.

Hope this helps!

If x^3=-27x^3=-27,then what is x?