(х-4)^2-6=(2+х)^2 2) (5-у)^2+17=(у-3)^2 решите

1) x^2 - 8x + 16 - 6 = 4 + 4x + x^2
x^2 - 8x - 4x - x^2 = 4 + 6 - 16
-12x = - 68
x = 0,5
2) 25 - 10 y + y^2 + 17 = y^2 - 6y + 9
-10y + y^2 - y^2 + 6y = 9-25-17
-4 y = -33
y= 8,25