若x+y=-6,xy=2.75,求x-y的值 这题怎么算啊快点回复、要过程!谢谢啦~
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/31 03:33:22
![若x+y=-6,xy=2.75,求x-y的值 这题怎么算啊快点回复、要过程!谢谢啦~](/uploads/image/z/1782112-40-2.jpg?t=%E8%8B%A5x%2By%3D-6%2Cxy%3D2.75%2C%E6%B1%82x-y%E7%9A%84%E5%80%BC+%E8%BF%99%E9%A2%98%E6%80%8E%E4%B9%88%E7%AE%97%E5%95%8A%E5%BF%AB%E7%82%B9%E5%9B%9E%E5%A4%8D%E3%80%81%E8%A6%81%E8%BF%87%E7%A8%8B%21%E8%B0%A2%E8%B0%A2%E5%95%A6%7E)
x){ѽBVLHTƦ
Z6QxE35=|S_i.}bYWt+ذN]VgTO`]Ę_`gCC48#0߶"H2HרE@(k F
!kk2@mMu@~qAbS6`5654` ݩ
若x+y=-6,xy=2.75,求x-y的值 这题怎么算啊快点回复、要过程!谢谢啦~
若x+y=-6,xy=2.75,求x-y的值 这题怎么算啊
快点回复、要过程!谢谢啦~
若x+y=-6,xy=2.75,求x-y的值 这题怎么算啊快点回复、要过程!谢谢啦~
(x-y)^2
=x^2+y^2-2xy
=x^2+y^2+2xy-4xy
=(x+y)^2-4xy
=(-6)^2-4*2.75
=25
x-y=5,x-y=-5
(x-y)^2=(x+y)^2-4xy=36-11=25
所以x-y=5
若x+y=6,xy=2.75,x-y>0,求x-y的值
若x^2+xy+y=14,y^2+xy+x=28,求x+y
若x+y=5,xy=6,求x^2y+xy^2的值
若正实数x,y满足2x+y+6=xy,求xy的最小值.
若正实数X,Y满足2X+Y+6=XY,求XY的最小值.
若x+y=4,x-y=6,求xy(y^2+y)-y^2(xy+2x)-3xy的值.
若x-y=5,xy=6,求x^2-xy^2和x^2y+xy^2
若x+y=4 x-y=6 求xy(x^2+y)-y^2(xy+2x)-3xy的值求值
若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y 不好意思,是3x-2xy-3y/x-2xy-y
|x|/x+y/|y|+xy/|xy|=
1-2/x+y=xy,4y+6x=xy.求xy的解?
已知x+y=6,xy=7,试求x*x+y*y,x*x-y*y的值
已知xy=-2,x-y=3,求(x+y)(x-y)-y^2+(x-y)^2-(6x^2y-2xy^2)÷2y
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值
已知x的平方+y的平方-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
1/x-1/y=x,求5y+xy-5y/y-xy-x=?
诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy)