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MATRIX ALGEBRA AND SYSTEMS OF EQUATIONS

Systems of linear equations and determinants. 1.3.1. Solving simple 2x2 systems using elementary row operations. Consider the following simple 2x2 systemof linear equations a11 x1 + a12x2 = b1 (7) a21 x1 + a22 x2 = b2 We can write this in matrix form as Ax= b A = a11 a12 a21 a22 ,x= x1 x2 ,b= b1 b2 . (8)

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