Question

PLEASE PLEASE PLEASE HELP!!

Can someone please help me with a step by step of this problem ? I'll seriously appreciate it, and thank you so so so much in advance!!
DON'T ANSWER IF YOU'RE UNSURE!!! I need actual help, please don't just take my points. :c

Answer 1

9 a
------ = -----
a 5

a^2 = 45

a = 3√5

4 b
------ = -----
b 5

b^2 = 20

b = 2√5

answer:

a = 3√5
b = 2√5

hope it helps