What is the standard form of a quadratic equation?

ax^2 + bx + c = 0

ax^2 + b = c

a(x - h)^2 + k = 0

a(x - p)(x - q) = 0

The standard form of a quadratic equation is ax^2 + bx + c = 0.

It represents a quadratic polynomial set equal to zero, where a, b, and c are constants.