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x in (-oo:+oo)
(x+3/2)^2 = 36 // - 36
(x+3/2)^2-36 = 0
(x+3/2)^2-36 = 0
x^2+3*x-135/4 = 0
x^2+3*x-135/4 = 0
x^2+3*x-135/4 = 0
DELTA = 3^2-(-135/4*1*4)
DELTA = 144
DELTA > 0
x = (144^(1/2)-3)/(1*2) or x = (-144^(1/2)-3)/(1*2)
x = 9/2 or x = -15/2
(x+15/2)*(x-9/2) = 0
(x+15/2)*(x-9/2) = 0
( x+15/2 )
x+15/2 = 0 // - 15/2
x = -15/2
( x-9/2 )
x-9/2 = 0 // + 9/2
x = 9/2
x in { -15/2, 9/2 }
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