225x 2 - 4 = 0; √ 225y + 2 = 0

225x² - 4 = 0;
⇒ 225x² = 4 ⇒ x² = 4/225
∴ x = √4/225 = ± 2/15, i.e., 2/15 and -2/15
and √225y + 2 = 0 or √225y = -2
On squaring both sides, we get
(√225y)² = (-2)²
⇒ 225y = 4
∴ y = 4/225
So, relation cannot be established because 4/225 lies between 2/15 and -2/15.