解方程：(29-2x)(22-2x)=478.5

解方程：
1、(29-2x)(22-2x)=478.5
638-58x-44x+4x^2=478.5
4x^2-102x+159.5=0
x^2-25.5x+39.875=0
[x-12.75]^2=122.6875
x-12.75=+/-11.08
x1=23.83
x2=1.67
2、{[5+（5-1.25x）]/2}x=5
[(10-1.25x)/2]x=5
[5-0.625x]x=5
5x-0.625x^2-5=0
x^2-8x+8=0
[x-4]^2=8
x-4=+/-2根2
X1=4+2根2
X2=4-2根2