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x in (-oo:+oo)
x^2+(3/2)*x-(7/16) = 0
x^2+(3/2)*x-7/16 = 0
x^2+3/2*x-7/16 = 0
DELTA = (3/2)^2-(-7/16*1*4)
DELTA = 4
DELTA > 0
x = (4^(1/2)-3/2)/(1*2) or x = (-4^(1/2)-3/2)/(1*2)
x = 1/4 or x = -7/4
x in { -7/4, 1/4 }
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