根号下(169-x的平方)—根号下(36-x的平方)=根号下2倍(25—x的平方)两边同时平方,得:
205-2x^2-2根号下[(169-x^2)*(36-x^2)]=50-2x^2
整理得:2根号下[(169-x^2)*(36-x^2)]=155,再两边同时平方,得:
4(169-x^2)*(36-x^2)=155^2
解得x^2=
根号下(169-x的平方)—根号下(36-x的平方)=根号下2倍(25—x的平方)两边同时平方,得:
205-2x^2-2根号下[(169-x^2)*(36-x^2)]=50-2x^2
整理得:2根号下[(169-x^2)*(36-x^2)]=155,再两边同时平方,得:
4(169-x^2)*(36-x^2)=155^2
解得x^2=