Question

(X²+Y²)（X²+Y²-2）+1=0求X²+Y²的值

Answer 1

(X²+Y²)（X²+Y²-2）+1=0（X²+Y²）² -2 （X²+Y²） +1 =0（X²+Y² -1）² =0X²+Y² -1 =0X²+Y² =1【秋风燕燕为您作答】有什么不明白可...