If one root of the equation x2-2x+k=0 is 1+2i then the value of k is

Question

If one root of the equation x2-2x+k=0 is 1+2i then the value of k is

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Genesis 2 months 2021-10-05T04:40:43+00:00 1 Answer 0 views 0

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    2021-10-05T04:42:08+00:00

    Step-by-step explanation:

    (1+2i)²-2(1+2i)+k=0

    1+4i²+4i-2-4i+k=0

    1-4+4i-2-4i+k=0

    1-4-2+k=0

    -3-2+k=0

    -5+k=0

    -5=-k

    k=5 OK friend

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