2X²-8xy+8y² 4x³-4x²y-(x-y)aX³y+aXy³-2aX²y² X²(X-y)+( y-X)已知2X+y=kX=4K+3 如果x与y互为相反数,则K=＿

2X²-8xy+8y² 4x³-4x²y-(x-y)aX³y+aXy³-2aX²y² X²(X-y)+( y-X)已知2X+y=kX=4K+3 如果x与y互为相反数,则K=＿
2X²-8xy+8y² 4x³-4x²y-(x-y)
aX³y+aXy³-2aX²y² X²(X-y)+( y-X)
已知2X+y=k
X=4K+3 如果x与y互为相反数,则K=＿

2X²-8xy+8y² 4x³-4x²y-(x-y)aX³y+aXy³-2aX²y² X²(X-y)+( y-X)已知2X+y=kX=4K+3 如果x与y互为相反数,则K=＿
y=-x,代入2X+Y=K,得x=k,代入x=4k+3,得k=-1