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(8*(h+x)^2+3*(h+x)-(8*x^2)-(3*x)-2+2)/h = 0
(8*(h+x)^2+3*(h+x)-8*x^2-3*x-2+2)/h = 0
8*(h+x)^2+3*(h+x)-8*x^2-3*x-2+2 = 0
8*(h+x)^2+3*(h+x)-8*x^2-3*x-2+2 = 0
8*h^2+16*h*x+3*h+8*x^2-8*x^2+3*x-3*x-2+2 = 0
8*h^2+16*h*x+3*h+3*x-3*x-2+2 = 0
8*h^2+16*h*x+3*h-2+2 = 0
8*h^2+16*h*x+3*h = 0
8*h^2+16*h*x+3*h = 0
(8*h^2+16*h*x+3*h)/h = 0
16*h*x+8*h^2+3*h = 0 // - 8*h^2+3*h
16*h*x = -(8*h^2+3*h) // : 16*h
x = (-(8*h^2+3*h))/(16*h)
x = (-1/16)*h^-1*(8*h^2+3*h)
x = (-1/16)*h^-1*(8*h^2+3*h)
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