Khan Academy: Linear Algebra: Row Space Solution to Ax = B Example

An instructional video that gives an example of how to find a solution to the equation Ax = b. In the example, the matrix A is 2 x 2. Shows that when the solution is a member of the row space of A for a given vector b, a member of the column space of A, then the solution is unique and the shortest solution to the equation. The equation is solved using linear algebra and also graphed so that it can be confirmed visually. [19:38]