(1.6x-3)²+(4-0.8x)²=(x-3)²+4²
2.56x²-9.6x+9+16-6.4x+0.64x²=x²-6x+9+16
2.56x²+0.64x²-9.6x-6.4x+9+16=x²-6x+9+16
3x²-16x+25-x²+6x-25=0
3x²-x²-16x+6x+25-2551=0
2x²-10x=0
x²-5x=0
﹙x-5﹚x=0
∴x=5或x=0
(1.6x-3)²+(4-0.8x)²=(x-3)²+4²
2.56x²-9.6x+9+16-6.4x+0.64x²=x²-6x+9+16
2.56x²+0.64x²-9.6x-6.4x+9+16=x²-6x+9+16
3x²-16x+25-x²+6x-25=0
3x²-x²-16x+6x+25-2551=0
2x²-10x=0
x²-5x=0
﹙x-5﹚x=0
∴x=5或x=0