How do you evaluate $-81^(3/4)$ ?

Question

7940 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-06-22T12:16:17

$=color(blue)( - 27$

$81 = color(blue)(3^4$

the expression can be re written as :
$= -color(blue)((3^cancel4))^(3/cancel4)$
$= -(3)^3$
$=color(blue)( - 27$

How do you evaluate -81^(3/4) -81^(3/4)?