Verified Answer :

17² < 300 < 18²

1717 < 300 < 1818

289 < 300 < 324

so true ;)

√300 = √(475) = 2√75  = 2√(253) = 2√(553) = 10√3

17 = (17  √3) / √3 
18 = (18
 √3) / √3

you can try to eliminate √3 and you will see that is true