[4x+(-2y-6y)]-[5y+(3x+2x)]?
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[4x+(-2y-6y)]-[5y+(3x+2x)]?
[4x+(-2y-6y)]-[5y+(3x+2x)]?
[4x+(-2y-6y)]-[5y+(3x+2x)]?
5X
4x-2y-6y*-y-3x+5y* *=2 就是平方
[2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2
4x-2y-6y平方-y-3x+5y平方
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+(x-3y)(x-5y)+(x-2y)(x-4y)
化简(x+y)-(2x+y/2)-(3x+y/6)-(4x+y/12)-(5x+y/20)-……-(10x+y/90)
把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)= 3(x-y)把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)=3(x-y)²-4(x-y)+7(x-y)-6(x-y)²=
【(4x-3y)(4x+3y)-(2x-3y)(5x+3y)]除以6x
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2]
2(2x+3y)(3x+2y)-(6x-y)(2x-5y)
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2
(x+y)^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 ..
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6