-¾ y2 = 2y + 7

(ii) -¾ y² = 2y + 7

Sol. – ¾ y² = 2y + 7

∴ – ¾ y² - 2y – 7 = 0

Changing the sign,

∴ ¾ y² + 2y + 7 = 0

Here a = ¾ , b = 2, c = 7 are real numbers

where a ≠ 0

So it is a quadratic equation in variable y.