已知实数a,b满足:a+b=1,ab=-2,求b/a+a/b的值.

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已知实数a,b满足:a+b=1,ab=-2,求b/a+a/b的值.已知实数a,b满足:a+b=1,ab=-2,求b/a+a/b的值.已知实数a,b满足:a+b=1,ab=-2,求b/a+a/b的值.A

已知实数a,b满足:a+b=1,ab=-2,求b/a+a/b的值.
已知实数a,b满足:a+b=1,ab=-2,求b/a+a/b的值.

已知实数a,b满足:a+b=1,ab=-2,求b/a+a/b的值.
A=2,B=-1,或者A=-1,B=2,B/A+A/B=-5/2

b/a+a/b=(b^2+a^2)/(ab)=[(a+b)^2-2ab]/ab =[(1)^2-2(-2)]/-2 = - 5/2