Cramer's Rule

Hello,

Today I will talk about Cramer's rule. Cramer's rule involves using matrices to solve systems of equations. A quick refresher on matrices: finding the determinant of a 2x2 is ad-bc. Finding the determinant of a 3x3 involves making smaller 2x2's and finding the minors or determinants of those. Substitute the solution column for each variable, finding the determinant of the new matrices formed. Dx/D = x value, Dy/D = y value, and Dz/D = z value. This will solve your equation and allow you to find your answer. Not so hard was it?

Thanks,
Kaili Chiu