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|1 -1| = P

|-2 1|

|-1 -1| For P^-1, i got this.

|-2 -1|

|-1 -2| My solutions manual, says this is the answer.

|-1 -1|

My solutions manual has been wrong before. The way i got my answer was to put the identity matrix to the right of P and solve for the right side and get the left into the identity.

|1 -1|1 0| = P

|-2 1|0 1|

|1 0|-1 -1| = P^-1

|0 1|-2 -1|

Thanks

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# Inverse matrix

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