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Let A be a square matrix such that A^...

Let `A` be a square matrix such that `A^2-A+I=O` , then write `A^(-1)` in terms of `Adot`

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`A^2−A+I=0=A−A^2=I`
or `A(I−A)=I`
` A^(−1)=I−A`
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