The answer can be tricky but it ends up being 585
Hope this helps!
Answer:
1
Step-by-step explanation:
we can factorize it as

so as you can see there aren't any square numbers there
so the biggest is 1
because 1 is always a perfect square
Answer:
if you meant x times y...
15 x 20 is 300.
if you meant x + y...
15 + 20 is 35.
if you meant anything else, please let me know
the way it was written confused me but I tried.