For a quadratic in standard form (y = ax^2 + bx + c), use (x = -frac{b}{2a})
Substitute that (x)-value into the quadratic to find (y)
The vertex is (left(-frac{b}{2a}, fleft(-frac{b}{2a}right)right))
For a quadratic in vertex form (y = a(x-h)^2 + k), the vertex is ((h, k))
If the quadratic is factored or in another form, rewrite it into standard form or vertex form first