5*x*(x - 4) - x*(3 + 5*x) = 4
5*x*(x-4)-x*(3+5*x) = 4
5*xx-4-x3+5*x = 4
-x*(3 + 5*x) + 5*x*(-4 + x) = 4
x = 8 / ((4 - x*(3 + 5*x) + 5*x*(-4 + x))/x)
x1 = -4/23
sum
-4/23
=
product
x1 = -0.173913043478261