Sec 6: Inverse Matrices

Inverse of a Matrix. Let A be a 2 x 2 matrix. If det A ≠ 0, then A has an inverse. So, A -1 = 1 det A ∙ d -b -c a . Think About It – Why can’t the determinant of A be 0? Ex 2: Finding an Inverse Matrix. Find the inverse of M= -2 2 5 -4 . Step 1: Find the determinant of M. ................
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