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17 December, 08:53

What is the solution of sqrt 1-3x = x+3

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  1. 17 December, 11:04
    0
    x = - 1

    Step-by-step explanation:

    1-3x=x²+6x+9

    1-3x-x²-6x-9=0

    -8-9x-x²=0

    x²+9x+8=0

    x²+8x+x+8=0

    (x+8) (x+1) = 0

    x+8=0

    x+1=0

    sqrt 1-3 (-8) = -8+3

    sqrt 1-3 (-1) = -1+3

    5=-5

    2=2

    x≠8

    x=-1
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