Question

x^2+y^2-x-6y+9.25=0,求x,y的值

Answer 1

这种题目有2个未知数,但只一个方程,一般要用配方法解. x^2 + y^2 - x - 6y + 9.25 = 0 x^2 - x + 0.25 + y^2 - 6y + 9 = 0 (x - 0.5)^2 +(y - 3)^2 = 0 x = 0.5 y = 3