(x^2+y^2)(x^2+3+y^2)-54=0 ,x^2+y^2=?
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/26 16:42:47
(x^2+y^2)(x^2+3+y^2)-54=0,x^2+y^2=?(x^2+y^2)(x^2+3+y^2)-54=0,x^2+y^2=?(x^2+y^2)(x^2+3+y^2)-54=0,x^2+
(x^2+y^2)(x^2+3+y^2)-54=0 ,x^2+y^2=?
(x^2+y^2)(x^2+3+y^2)-54=0 ,x^2+y^2=?
(x^2+y^2)(x^2+3+y^2)-54=0 ,x^2+y^2=?
令a=x²+y²
a(a+3)-54=0
a²+3a-54=0
(a+9)(a-6)=0
a=x²+y²≥0
所以a=6
所以x²+y²=6
设x^2+y^2=a a大于等于0
a(a+3)-54=0 a^2+3a-54=0 得a=6或a=-9
a=6
x(x-y)2-(y-x)3
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
计算：x+2y/x-y+2x/y-x-3y/x-y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
化简y(x+y)+(x+y)(x-y)-x^2
(x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2
2X(2X-3Y)-3Y(X+Y)
(-2x y)^2-(3y-x)(-x-3y)
（x+2y)^2-(x+y)(3x-y)
计算(x+y)(x+y)^2(-x-y)^3
化简:5(x-y)+2(x+y)-3(x-y)
3x(x-y)+2y(x-y) 计算
化简3(x-y)-7(x--y)+2(y-x)