(X-60)^2+(100/2)^2=R^2 打错了,是(X-60)^2+(100/2)^2=X^2 -

问题描述:

(X-60)^2+(100/2)^2=R^2
打错了,是(X-60)^2+(100/2)^2=X^2 -

(X-X+60)(X+X-60)=50^2=2500
60*(2X-60)=2500
2x-60=2500/60=125/3
2x=305/3
x=305/6