M^2+2MN+2N^2-6N+9=0 (3m+n)^2(n-3)^2 所以n=3,m=-3 所以n^2 分之m=-3分之1(1)若x^2+4x+4+y^2-8y+16 =0,求x分之y的值 (2)若x^2+2y^2-2xy+2y+1=0,求x+2y的值.
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![M^2+2MN+2N^2-6N+9=0 (3m+n)^2(n-3)^2 所以n=3,m=-3 所以n^2 分之m=-3分之1(1)若x^2+4x+4+y^2-8y+16 =0,求x分之y的值 (2)若x^2+2y^2-2xy+2y+1=0,求x+2y的值.](/uploads/image/z/1670156-44-6.jpg?t=M%5E2%2B2MN%2B2N%5E2-6N%2B9%3D0+%EF%BC%883m%2Bn%EF%BC%89%5E2%EF%BC%88n-3%EF%BC%89%5E2+%E6%89%80%E4%BB%A5n%3D3%2Cm%3D-3+%E6%89%80%E4%BB%A5n%5E2+%E5%88%86%E4%B9%8Bm%3D-3%E5%88%86%E4%B9%8B1%EF%BC%881%EF%BC%89%E8%8B%A5x%5E2%2B4x%2B4%2By%5E2-8y%2B16+%3D0%2C%E6%B1%82x%E5%88%86%E4%B9%8By%E7%9A%84%E5%80%BC+%EF%BC%882%EF%BC%89%E8%8B%A5x%5E2%2B2y%5E2-2xy%2B2y%2B1%3D0%2C%E6%B1%82x%2B2y%E7%9A%84%E5%80%BC.)
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M^2+2MN+2N^2-6N+9=0 (3m+n)^2(n-3)^2 所以n=3,m=-3 所以n^2 分之m=-3分之1(1)若x^2+4x+4+y^2-8y+16 =0,求x分之y的值 (2)若x^2+2y^2-2xy+2y+1=0,求x+2y的值.
M^2+2MN+2N^2-6N+9=0 (3m+n)^2(n-3)^2 所以n=3,m=-3 所以n^2 分之m=-3分之1
(1)若x^2+4x+4+y^2-8y+16 =0,求x分之y的值 (2)若x^2+2y^2-2xy+2y+1=0,求x+2y的值.
M^2+2MN+2N^2-6N+9=0 (3m+n)^2(n-3)^2 所以n=3,m=-3 所以n^2 分之m=-3分之1(1)若x^2+4x+4+y^2-8y+16 =0,求x分之y的值 (2)若x^2+2y^2-2xy+2y+1=0,求x+2y的值.
(1)方法一样可得x=-2 y=4,故结果为-2 .x^2+4x+4+y^2-8y+16=(x+2)^2+(y-4)^2=0
(2)x=y=-1,故结果为-3..x^2+2y^2-2xy+2y+1=(x-y)^2+(y+1)^2=0
m+2mn+2n-6n+9=0,求m / n的值
已知实数m,n,且m>n>0,m²+n²=4mn,则m²﹣n²/mn的值等于∵(m+n)²=m²+2mn+n²,(m-n)²=m²-2mn+n²,m²+n²=4mn.(m+n)²=6mn(m-n)²=2mn(m+n)²(m-n)²=12m²n²mm³-2m
m-n=7 mn=-5求(3m+5n+4mn)-(2n-4n+6mn)
已知mn-n=15,m-mn=6,则m-n=_,-2mn+m+n=_
已知mn-m=15,n-mn=6则n-m=( ),-2mn+m+n=( )
mn-n=15 ; m-mn=6 那么m-n=( ) ; -2mn+m+n=( )
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已知m^2+n^2+2mn-6m-6n+9=0,求(m+n)^2
已知MN^2=-6,求-MN(M^2N^5-MN^3-N)的值
若m^2+2mn+2n^2-6n+9=0,求m除以n^2的值
若m^2+2mn+2n^2-6n+9=0,求m除以n^2的值
m方+2mn+2n方—6n+9=0,求m/n方的值.
1/M+1/N=5 (3M+MN+2N) / (M-MN=3N)
m+n=0,那么m^3-m^2n-mn^2+n^3是多少
先化简再求值,3m^2-mn/9m^2-6mn+n^2其中m=3n
若m+n=0,则多项式m^3-m^3n-mn^2+n^3
若m+n=9,mn=14,则m^2-mn+n^2=几