Question

(x+1)^2+y^2=(x-5)^2+y^2=36 解出x与y的值

Answer 1

(x+1)^2+y^2=(x-5)^2+y^2

两边打开 得出 x^2+2x+1+y^2=x^2-10x+25+y^2

x=2

带入(x-5)^2+y^2=36

y=3根号3 或者 y=-3根号3

x=2 y=3根号3

x=2 y=-3根号3