[(3x-y)^2-y(-6x+y)-4x]÷3x的算法..
2(y-x)的平方-7(x-y)+6(x-y)-3(y-x)的平方
计算:(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2
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
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
因式分解3x^2(x-y)+6x(y-x)