Question

y² – 4 = 11y.

Answer 1

Given: y² – 4 = 11y.
On transposing 11y to the left-hand side, we get:
y² – 4 – 11y = 0
$\Rightarrow$ y² – 11y – 4 = 0
On comparing this equation with the general form of the quadratic equation ay² + by + c = 0, we get:
a = 1, b = –11 and c = –4, which are real numbers and a $\ne$ 0.
Thus, the given equation is a quadratic equation in the variable y.