Simplify the expression. Assume all variables represent positive real numbers.
-$\sqrt [ 4 ] { 81 a ^ { 4 } }$
A) $3 a$
B) $3 \sqrt { a }$
C) $3 a ^ { 2 }$
D) $81 a$

Question

Quizplus · Accepted Answer

The expression $\sqrt [ 4 ] { 81 a ^ { 4 } }$ simplifies to $3 a$ because $\sqrt [ 4 ] { 81 }$ equals 3 (since $3^4 = 81$) and $\sqrt [ 4 ] { a ^ { 4 } }$ equals $a$ (since taking the fourth root undoes the fourth power).

Simplify the Expression 81a44\sqrt [ 4 ] { 81 a ^ { 4 } }481a4​

Simplify the Expression $\sqrt [ 4 ] { 81 a ^ { 4 } }$