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If A=[(3,1),(7,5)] , find x and y so tha...

If `A=[(3,1),(7,5)]` , find x and y so that `A^2 + xI-yA`=0. Hence find `A^(-1)`

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MODERN PUBLICATION-DETERMINANTS-EXERCISE
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  3. If A=[(3,1),(7,5)] , find x and y so that A^2 + xI-yA=0. Hence find A^...

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  4. Without expanding, show that the following determinants vanish: {:|(...

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