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x*((x+8.7)/0.5) = 2.3 // - 2.3
x*((x+8.7)/0.5)-2.3 = 0
(x*(x+8.7))/0.5-2.3 = 0
(x*(x+8.7))/0.5+(-2.3*0.5)/0.5 = 0
x*(x+8.7)-2.3*0.5 = 0
x^2+8.7*x-1.15 = 0
x^2+8.7*x-1.15 = 0
x^2+8.7*x-1.15 = 0
DELTA = 8.7^2-(-1.15*1*4)
DELTA = 8.7^2+4.6
DELTA = 80.29
DELTA > 0
x = ((8.7^2+4.6)^(1/2)-8.7)/(1*2) or x = (-(8.7^2+4.6)^(1/2)-8.7)/(1*2)
x = ((8.7^2+4.6)^(1/2)-8.7)/2 or x = (-((8.7^2+4.6)^(1/2)+8.7))/2
(x+((8.7^2+4.6)^(1/2)+8.7)/2)*(x-(((8.7^2+4.6)^(1/2)-8.7)/2)) = 0
((x+((8.7^2+4.6)^(1/2)+8.7)/2)*(x-(((8.7^2+4.6)^(1/2)-8.7)/2)))/0.5 = 0
((x+((8.7^2+4.6)^(1/2)+8.7)/2)*(x-(((8.7^2+4.6)^(1/2)-8.7)/2)))/0.5 = 0 // * 0.5
(x+((8.7^2+4.6)^(1/2)+8.7)/2)*(x-(((8.7^2+4.6)^(1/2)-8.7)/2)) = 0
( x+((8.7^2+4.6)^(1/2)+8.7)/2 )
x+((8.7^2+4.6)^(1/2)+8.7)/2 = 0 // - ((8.7^2+4.6)^(1/2)+8.7)/2
x = -(((8.7^2+4.6)^(1/2)+8.7)/2)
( x-(((8.7^2+4.6)^(1/2)-8.7)/2) )
x-(((8.7^2+4.6)^(1/2)-8.7)/2) = 0 // + ((8.7^2+4.6)^(1/2)-8.7)/2
x = ((8.7^2+4.6)^(1/2)-8.7)/2
x in { -(((8.7^2+4.6)^(1/2)+8.7)/2), ((8.7^2+4.6)^(1/2)-8.7)/2 }
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