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x^2-((3/4)*x)-4 = 0
x^2+(-3/4)*x-4 = 0
x^2-3/4*x-4 = 0
DELTA = (-3/4)^2-(-4*1*4)
DELTA = 265/16
DELTA > 0
x = ((265/16)^(1/2)+3/4)/(1*2) or x = (3/4-(265/16)^(1/2))/(1*2)
x = ((265/16)^(1/2)+3/4)/2 or x = (3/4-(265/16)^(1/2))/2
x in { (3/4-(265/16)^(1/2))/2, ((265/16)^(1/2)+3/4)/2 }
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