Mathematics, 12.02.2020 04:16 DIGlBICK9402

Which values of x and y would make the following expression represent a real number
(4 +5i)(x + yi)

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Which values of x and y would make the following expression represent a real number
(4 +5i)(x +...

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Which values of x and y would make the following expression represent a real number(4 +5i)(x + yi)

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Another question on Mathematics

Which values of x and y would make the following expression represent a real number
(4 +5i)(x + yi)