Question

Simplify: squareroot 64r^8 8r2 8r4 32r2 32r4

Answer 1

B

Explanation:

edg21

Answer 2

8r^4

Explanation:

√(64r^8) = √((8r^4)^2) = 8r^4

_____

You can make use of either or both of these rules of exponents:

(a^b)^c = a^(b·c) . . . . . used above

`\sqrt[n]{a}=a^{(1)/(n)}`

Using the second rule, you can write the expression as ...

`√(64r^8)=√(64)\cdot r^{8\cdot(1)/(2)}=8r^4`