(2x+3)(y-1)-(x+1)(2y-3); (2a+3b)(2a-3b)(4a^2-9b^2)
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/09 15:02:07
![(2x+3)(y-1)-(x+1)(2y-3); (2a+3b)(2a-3b)(4a^2-9b^2)](/uploads/image/z/10196455-31-5.jpg?t=%282x%2B3%29%28y-1%29-%28x%2B1%29%282y-3%29%EF%BC%9B+%282a%2B3b%29%282a-3b%29%284a%5E2-9b%5E2%29)
xM
12%Ҵ@nҳxLGY*y#y!%`Ao3 wqFQBLz
ږ?n3{fKG߉<W=J :gZ+%:jrN
OeH
(2x+3)(y-1)-(x+1)(2y-3); (2a+3b)(2a-3b)(4a^2-9b^2)
(2x+3)(y-1)-(x+1)(2y-3); (2a+3b)(2a-3b)(4a^2-9b^2)
(2x+3)(y-1)-(x+1)(2y-3); (2a+3b)(2a-3b)(4a^2-9b^2)
(1)
(2x+3)(y-1)-(x+1)(2y-3)
=2xy+3y-2x-3-(2xy+2y-3x-3)
=2xy+3y-2x-3-2xy-2y+3x+3
=x+y
(2)
(2a+3b)(2a-3b)(4a^2-9b^2)
=(4a^2-9b^2)(4a^2-9b^2)
=16a^4-72a^2b^2+81b^4
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
(3x-y)^2+(3x+y)(3x-y),x=1,y=-2
二元一次方程 :2(x+y)-(x-y)=3 (x+y)-2(x-y)=1
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y
(Y-X)^3*(X-Y)^m+(X-Y) ^m+1*(Y-X)^2
(x-y)^2+(x+y)(x-y) 其中 X =3 Y=-1
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
x+y+2(-x-y+1)=3(1-y-x)-4-(y+x-1),x+y=?
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
先化简 再求值 (2x-y)(y+x)-(x-2y)(2y+x)-(-3y+x)^2其(√x+1)+y^2+4=-4y
计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8)
已知:2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x)