Question

Is -216/343 is a cube of rational. Give reason.

Answer 1

yeah, bcoz
³√-216/343=-6/7

Answer 2

$\frac{ - 216}{343} = \frac{ { - 6}^{3} }{ {7}^{3} }$

Here -6/7 is rational as it is in p/q form so it's cube -216/343 is also rational