已知x^2+9y^2+4x-6y+5=0,求xy的值 已知m^2+n^2-6m+10n+34=0则m+n=?

来源:学生作业帮助网 编辑:作业帮 时间:2024/09/16 08:15:00
xRJP )77i^;tKͮc +1iq_p#Bꪛ̙s ԋ1܉Oi¢q6N5 NnSz7!d78865 {6_bǐ'd<vt xEPLjmؤ5-R kPU:f`@mo;>VR{r.4ɾĵ(pG&T,~GxM #܌D D*ukH&##2Jʌb55_{0iqq +-=l &Y3L)ȣWrM^$1j{`Qŀ웅mܝg