Question

x+y=-2 xy=3 则x与y等于多少

Answer 1

x等于1(或减)加根号2乘i，y等于1(或加)减根号2乘i，也就是x=1+[2^(1/2)]i，y=1-[2^(1/2)]i或x=1-[2^(1/2)]i，y=1+[2^(1/2)]i
补充：
不好意思，由于才醒来，搞错了，x是负1加(或减)
根号
2乘i，y是负1减(或加)根号2乘1

Answer 2

x等于1(或减)加根号2乘i，y等于1(或加)减根号2乘i，也就是x=1+[2^(1/2)]i，y=1-[2^(1/2)]i或x=1-[2^(1/2)]i，y=1+[2^(1/2)]i