24=x^2-14xx=?
已知xx+yy+4x-6y+13=0,求(xx-2x)/xx+3yy的值.
已知XX+X+1=0,求XXX+2XX+2X+3的值
已知x(x+1)-(xx+y)=3,求(xx+yy)/2-xy的值
x(x+1)-(xx+y)=-3,求(xx+yy)/2-xy的值
x+xx+xxx=xxxx
已知:3x=xx-x+1求(xxxx+xx+1)分之xx
已知x/(xx+x+1)=a,求xx/(xxxx+xx+1)的值
已知2x=3y,求xy/xx+yy-yy/xx-yy的值
已知14(XX+YY+ZZ)=(X+2Y+3Z)^2,求X:Y:Z
题目是 (1) XX*X=XX X*X=XX X为未知数分别将1到9的9个数填入不能重复 *为乘号 (2)XX/X=X
(x-y)(x+y)(xx-yy)=?
XXX*XX=XX*XX=3624,X内填写1-9,数字不能重复