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Compute A^(-1) for the following matrix ...

Compute `A^(-1)` for the following matrix `A=[(-1,2,5),(2,-3,1),(-1,1,1)]`. Hence solve the system of equations `-x+2y+5z=2, 2x-3y+z=15` & `-x+y+z= -3`

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The correct Answer is:
`A^(-1)=-(1)/(7)[(-4,3,17),(-3,4,11),(-1,-1,-1)]` & `x=2,y=-3, z=2`
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MOTION-MATRICES -Exercise - 3(Subjective - type Questions)
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