已知x+y=3,xy=-2,求x^3+y^3的值fast!
来源:学生作业帮助网 编辑:六六作业网 时间:2024/09/09 08:20:14
已知x+y=3,xy=-2,求x^3+y^3的值fast!已知x+y=3,xy=-2,求x^3+y^3的值fast!已知x+y=3,xy=-2,求x^3+y^3的值fast!x^3+y^3=(x+y)
已知x+y=3,xy=-2,求x^3+y^3的值fast!
已知x+y=3,xy=-2,求x^3+y^3的值
fast!
已知x+y=3,xy=-2,求x^3+y^3的值fast!
x^3+y^3
=(x+y)(x²-xy+y²)
=(x+y)[(x+y)²-3xy]
=3×(3²+6)
=45
已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.
已知:x/y=-2,求x^2-2xy-3y^2/x^-6xy
已知xy/x+y=3,求2x-3xy+2y/-x+3xy-y的值
已知xy/x+y=3,求2x-3xy+2y/-x+3xy-y的值
已知x-y=3xy,求分式3x+2xy-3y/x-2xy-y的值
已知xy/x+y=2,求代数式3x-xy+3y/-x+3xy-y的值
已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值.
已知(xy)/(x+y)=6求(3x-2xy+3y)/(-x+3xy-y)的值.
已知X+Y分之XY=2,求-X+3XY-Y分之3X+5XY+3Y
已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值
已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值.
已知3/(x-y)=1/xy 求(-x-2xy+y)/ (2x+3xy-2y)
已知x-y=3xy,求2x+3xy-2y/x-2xy-y
已知x-y=3xy,求2x-3xy-2y/x-2xy-y
已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-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
已知xy/x+y=3,求代数式2x-5xy+2y/x-3xy+y
已知3x=xy+3y,求2x+xy-2y/y-x-xy的值