If the absolute value of (X-5) ² + 2Y + 1 = 0, then x-2y=

If the absolute value of (X-5) ² + 2Y + 1 = 0, then x-2y=

(x-5)²+|2y+1|=0
∴x-5=0
2y+1=0
∴x=5
y=-1/2
∴x-2y=5-2×(-1/2)=5+1=6