Simplify the expression:

Question

.1 square root a^6 where a<0

Answer 1

a^3 * a^3 = a^6

for example
a = -2
-2*-2*-2 = -8 = a^3
-8 * -8 = 64 =( -2)^6

Answer 2

since a<0, √a^6 = |a^3| = -a^3

√(-2)^6 = √64 = 8