数理答疑团为您解答,希望对你有所帮助. 1^2+(4-b)^2=b^2+(a-1)^2 ...①ab=4 变为 a=4/b.②①变为：(4-b)^2-b^2=(a-1)^2 -1^2(4-b+b)(4-b-b)=(a-1+1)(a-1-1) 4(4-2b)=a(a-2)将②代入得：b²（2-b...