If x^2 + y^2 + 2x – 4y + 5 = 0, then find out the value of x + y.

Question

If x^2 + y^2 + 2x – 4y + 5 = 0, then find out the value of x + y.

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Julia 2 weeks 2021-11-19T17:21:45+00:00 1 Answer 0 views 0

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    2021-11-19T17:23:06+00:00

    Answer:

    x²+y²+2x-4y+5=0

    x²+y²+2x-4y= -5

    (x+y)²=x²+y²+2xy

    (x+y)²-2xy=x²+y²

    put value of x²+y²

    (x+y)²-2xy+2x-4y= -5

    (x+y)²=2(xy+x-2y)-5

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