解方程:(x/4)^2+[(56-x)/4]^2=196

问题描述:

解方程:(x/4)^2+[(56-x)/4]^2=196

(x/4)^2+[(56-x)/4]^2=196
x^2+(56-x)^2=196*16
x^2+3136-112x+x^2=3136
2x^2-112x=0
x(x-56)=0
x1=0
x2=56