### Video Summary:

Quadratic Equation in One Variable
An equation that can be written in the form
ax2 + bx + c = 0
where a, b, and c are real numbers with a 0, is a quadratic equation in standard form. One way to solve a quadratic equation P(x)=0 is to use factoring and the zero-product property. Zero-Product Property
If a and b are complex numbers and ab = 0, then a = 0 or b = 0 or both.