This video explains how to use the zero product property to factor and solve a quadratic equation. [5:36]

Demonstrates how to use the zero product property to solve quadratic equations. [9:50]

Sal finds the zeros, the vertex, & the line of symmetry of quadratic functions given in vertex form, factored form, & standard form. [8:22]

Different forms of quadratic functions reveal different features of those functions. Here, Sal rewrites an expression in factored form to reveal its zeros and in vertex form to reveal its vertex. [8:29]