How do I invert a 2x2 square matrix?

A 2x2 square matrix is of the format (a b;c d). First you must check whether the matrix is invertible at all: if ad - bc is 0, the matrix is not invertible. The inverse matrix is (1/(ad-bc))*(d -b;-c a)

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Answered by Anita Y. Maths tutor

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