(a²+ab)÷(a²-b²)=?2.已知a²-4a+9b²+6b+5=0,求1/a-1/b的值 3.已知x²4.已知x+1/x=3,求x²÷(x四次方+x²+1)的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/06 04:22:19
xSJ1W2c:~(d>@"̲ZA]JVQt_1Ӻ/xN[X,W9$973F, ͠iE]2euzhNecu G.Adc:B#y^_OHȆMͦ|l8sRQ2!!Y2,<$8IÙ>`65 FIʣʑP;T٘ 0D2H &r3УqGJWЭd1?:|r VG^(²e
1l9wTcy`FL͏(9LdN炊K]8g|9nn?^bUZ( 4t:Xتz7
%LF@.}_',Y%:nU4*o4Cms&1}D>-