2 2 (x + 10) = (5 - x)
(x+10)^2 = (5-x)^2
100 + x^2 + 20*x = (5-x)^2
(x+10)^2 = 25 + x^2 - 10*x
75 + 30*x = 0
x = -75 / (30)
sum
-5/2
=
product
x1 = -5/2
x1 = -2.5