已知2x+3y=5,xy=2,则4x^2+9y^2=

来源：学生作业帮助网编辑：六六作业网时间：2024/11/26 13:51:36

已知2x+3y=5,xy=2,则4x^2+9y^2=已知2x+3y=5,xy=2,则4x^2+9y^2=已知2x+3y=5,xy=2,则4x^2+9y^2=(2x+3y)^2=5^24x^2+12xy

已知2x+3y=5,xy=2,则4x^2+9y^2=
已知2x+3y=5,xy=2,则4x^2+9y^2=

已知2x+3y=5,xy=2,则4x^2+9y^2=
(2x+3y)^2=5^2
4x^2+12xy+9y^2=25
4x^2+9y^2=25-12xy
4x^2+9y^2=1

已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y= 已知x-y=3xy,求5x+2xy-5y/x-4xy-y的值已知2/x-1/y=3,则(2y-x+4xy)/(3x-6y-5xy)=? 已知x-y=-3,xy=2则3x-5y-(x-3y-4xy)是多少已知1/X-1/Y=5 ,则x-2xy-y/4x+3xy-4y 已知x/y=3/4 ,则3xy-2y/2x+4xy=? 已知x+y=5,xy=-3,则x^2y+xy^2, 已知xy/x+y=2,则代数式3x-5y+8y/-x+3xy-y的值已知x,y>0 2x+y+3=xy 求5x+4y最小值已知1/x+1/y=5,求x+y+3xy/2x-4xy+2y的值,已知1/x+1/y=5,x+y+3xy/2x-4xy+2y的值, 已知x-y=4,xy=－2,则代数式(3x-4y+5xy)-(2x-3y-2xy)的值是多少已知x+y=5,xy=-1,则（3x-4y+2xy）-（2x-5y+5xy）=? 已知x+y=5,xy=-1,则（3x-4y+2xy)-(2x-5y+5xy)=_______ 已知x-y=3,xy=4,则代数式(3x-4y+5xy)-(2x-3y)+5xy的值是? 已知x-y=3,xy=5则代数式（3x-4y+5xy）-（2x-3y）+5xy的值是已知x-y=3,xy=5,则代数式（3x-4y+5xy）-（2x-3y）+5xy的值是? 已知x-y=8 xy=7,则3xy-2x+2y+4(y-x)²=? 已知2/X-1/Y=3,则(X-2Y-XY)/(5XY+6Y-3X)=?