Question

I don't know how to solve this equation

Answer 1

Whenever powers are being divided, you can subtract the powers separately.

5a²/20a

You divide 5 by 20 first, so that's 0.25, then subtract 2-1 (no power visible is always 1), so your answer would be 0.25a OR
`(1)/(4)` a

Answer 2

first off, multiply everything by 20a
then divide everything by 5

5a^2 + 20a
a^2 + 4a