Answer:
[tex]8a^3[/tex]
Step-by-step explanation:
[tex]\sqrt{64a^6}[/tex]
[tex]\sqrt{64} \times \sqrt{a^6}[/tex]
[tex]8 \times \sqrt{a^6}[/tex]
[tex]8 \times a^{6 \times \frac{1}{2} }[/tex]
[tex]8 \times a^{\frac{6}{2} }[/tex]
[tex]8 \times a^3[/tex]
