计算(x/4)^2 + ((20-x)/x)^2 =12

问题描述:

计算(x/4)^2 + ((20-x)/x)^2 =12

4.696 或13.7358

(x/4)^2 + ((20-x)/x)^2 =12
(x^2/16)+(x^2-40x+400)/x^2=12
我做不下去了阿.抱歉