已知X+Y=6,xy=3求代数式(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/26 15:38:34
已知X+Y=6,xy=3求代数式(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值已知X+Y=6,xy=3求代数式(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值已知X+Y=
已知X+Y=6,xy=3求代数式(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值
已知X+Y=6,xy=3求代数式(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值
已知X+Y=6,xy=3求代数式(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值
先把代数式(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)化简
(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)
=5XY+4X+7Y+6X-3XY-4XY+3Y
=-2XY+10X+10Y
=-2XY+10(X+Y)
当X+Y=6,XY=3时
原式=-2*3+10*6
=-6+60
=54
打开代数式,得-2XY+10X+10Y,=-2XY+10(X+Y),又因为X+Y=6,XY=3,所以原式=-2*3+10*6=54
已知X+Y=6,xy=3求代数式(5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值
已知x+y=3,xy=1,求代数式5xy+4x+7y+6x-3xy-4xy+3y的值.
已知xy/x+y=3,求代数式3x-5xy+3y/-x+3xy-y的值.已知xy/x+y=3,求代数式3x-5xy+3y/-x+3xy-y的值.
已知,xy/x+y=3,求代数式3x-5xy+3y/-x+3xy-y的值
已知,xy/x+y=3,求代数式3x-5xy+3y/-x+3xy-y的值
已知xy/x+y=3,求代数式2x-5xy+2y/x-3xy+y
已知xy/x+y=2,求代数式3x-5xy+3y/-x+2xy-y的值
已知xy/x+y=2,求代数式8x-5xy+8y/-x+3xy-y的值
已知x+y=4,xy=-2,求代数式3(xy+2y)-(xy-6x)的值
已知x+y=4,xy=-2,求代数式3(xy+2y)-(xy-6x)
已知x+y=1/2,xy=-1/3,求代数式6x+5xy+6y的值
已知xy满足/ x-2/+(y+1)²=0试求代数式试求代数式-2xy乘5xy²+1/2x²y²乘2y-3x乘2y+6xy的值
已知xy/x+y=2,求代数式3x-5y+3y/-x+3xy-y
已知xy/x+y=2,求代数式3x-xy+3y/-x+3xy-y的值
已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值
已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值
已知x+y=5,xy=3,求代数式x^3y-2x^y^2+xy^3RT
已知X-Y=-3,XY=2,求代数式(3X-5Y)-(X-3Y-4XY)