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If z = 2-3i, then show that z^2 - 4z + 1...

If `z = 2-3i`, then show that `z^2 - 4z + 13 = 0`

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The correct Answer is:
`z^(2) + 4 - 4z = -9 => z^2 - 4z + 13 = 0 `
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