m²(x-y)+n²(y-x)
m²(x-y)+n²(y-x)
已知m=x²+y²/x²+y²,n=2xy/x²+y²,则下
M={(x,y)|x²+y²≤4},N={(x,y)|(x-1)²+(y-1)²
设椭圆x²/m²+y²/n²=1(m>0,n>0)的右焦点与抛物线y²
1.因式分解(1) 1-4x²y²(2) 16m²+25n²+40mn(3) 2
已知,单项式M,N满足2x(M+3x)=6x²y²+N,求M,N
几道分解因式的题,2X²-4X= 8m²n+2mn=a²x²y-axy²
1.已知椭圆x²/4+y²/n=1与双曲线x²/8-y²/m=1有相同的焦点,则
已知方程x²+y²-2(m+3)+2(1-4m²)+(4m²)²+9=
请求几道数学题啊,1.16m²-4n²2.4(x-y)三次方-8x(x-y)²3.a的四次
因式分解:m³-2m²-4m+8;x²-2xy+y²-9
(x²+4y²)²-16x²y² 因式分解