please help will mark brainliest!!!!

Answer: Its 4a square root of a - square root of a
Step-by-step explanation:
Answer:
[tex] 4a \sqrt{a} - \sqrt{a} [/tex]
Step-by-step explanation:
[tex] \sqrt{16a^3} - \sqrt{a} = [/tex]
[tex] = \sqrt{4^2 \times a^2 \times a} - \sqrt{a} [/tex]
[tex] = 4a \sqrt{a} - \sqrt{a} [/tex]