-(x+3.5)^2 +17/4 =-4x-6
    -(x+3.5)^2 +17/4 =-4x+6
    6x^2-32x-118=0
    6x^2-32x-32=0
    6x^2-32x-29=0
    6x^2-32x=0
    -(x+3.5)^2 +17/4 =-4(x+2)+2
    4*x^2+27*x+38=0
    4*x^2+27*x-11=0
    4*x^2+27*x-9=0
    4x^2+27x-9=0
    -1/4*(x+2) =-(x+3.5)^2+17/4
    -1/4*(x+2) =-(x+2.5)^2+17/4
    (-2-x)/4 =-(x+2.5)^2+17/4 -2
    (2-x)/4 =-(x+2.5)^2+17/4 -2
    (x-2.5)^2 = 0
    (2-x)/4 =-(x+2.5)^2
    x^2-1
    2/3+2=2(m-2/3)
    （2-√3）×（6+m+√3）

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