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21 January, 06:31

Solve x²-10x-20=0 using completing the square

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  1. 21 January, 07:01
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    Answer:x=5+-sq45

    Step-by-step explanation:

    X^2-10x-20=0

    -10/2=-5^2=25

    x^2-10x+25=20+25

    (x-5) ^2=45

    sq (x-5) = x-5

    x-5=+-sq45

    x=5+-sq45

    sq = squareroot symbol
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