已知x^2+xy=8,y^+xy=3,求下列各式的值:(1)x^2+2xy+y^2 (2)x^2-y^2
来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/22 16:50:26
已知x^2+xy=8,y^+xy=3,求下列各式的值:(1)x^2+2xy+y^2(2)x^2-y^2已知x^2+xy=8,y^+xy=3,求下列各式的值:(1)x^2+2xy+y^2(2)x^2-y
已知x^2+xy=8,y^+xy=3,求下列各式的值:(1)x^2+2xy+y^2 (2)x^2-y^2
已知x^2+xy=8,y^+xy=3,求下列各式的值:(1)x^2+2xy+y^2 (2)x^2-y^2
已知x^2+xy=8,y^+xy=3,求下列各式的值:(1)x^2+2xy+y^2 (2)x^2-y^2
x^2+2xy+y^2 =x²+xy+xy+y²=(x²+xy)+(xy+y²)=8+3=11
x²-y²=x²+xy-xy-y²=(x²+xy)-(xy+y²)=8-3=5
x^2+xy=8 (1)
y^2+xy=3 (1)
则
(1)+(2)=x^2+2xy+y^2=8+3=11
(1)-(1)=x^2-y^2=8-3=5
已知xy/x+y=2,求代数式8x-5xy+8y/-x+3xy-y的值
已知x-xy=8,xy-y=-9,求x+y-2xy的值
已知xy^2=-2,求-xy(x^2y^5-xy^3-y)的值.
已知xy^2=-2 求-xy(x^2y^5-xy^3-y)
已知2x+xy=10,3y+2xy=6.求4x+8xy+9y=?
已知x^2-xy=5,xy-y^2=-3求3(x^2-xy)-xy+y^2
已知x^+xy=-5,xy+y^=8,求2x^-xy-3y^的值都是2次
已知x:y=3:2,求(x²+3xy)/(xy+2xy)
已知xy为正整数,3xy=2x+3y+5.求xy=?
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