m²(x-y)+n²(y-x)(x+y)²-4(x²-y²)+4(x-y)²4(1+2x-3y)+(3y-2x)²2乘以a的n+1次方减去12乘以a的n次方+18乘以a的n-1次方
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m²(x-y)+n²(y-x)(x+y)²-4(x²-y²)+4(x-y)²4(1+2x-3y)+(3y-2x)²2乘以a的n+1次方减去12乘以a的n次方+18乘以a的n-1次方
m²(x-y)+n²(y-x)
(x+y)²-4(x²-y²)+4(x-y)²
4(1+2x-3y)+(3y-2x)²
2乘以a的n+1次方减去12乘以a的n次方+18乘以a的n-1次方
m²(x-y)+n²(y-x)(x+y)²-4(x²-y²)+4(x-y)²4(1+2x-3y)+(3y-2x)²2乘以a的n+1次方减去12乘以a的n次方+18乘以a的n-1次方
(m-n)(m+n)(x-y)
(x-4y)(x-2y)
(3y-2x-2)平方
2乘以a的n-1次方乘以(a-3)的平方
(x-y)(m+n)(m-n)
)
(m-n)(m+n)(x-y)
(x-4y)(x-2y)
(3y-2x-2)平方
2乘以a的n-1次方乘以(a-3)的平方
原式=(m+n)(m-n)(x-y)
原式=[(x+y)-2(x-y)]^2
=(x-5y)^2
原式=(2x-3y)^2+4(2x-3y)+4
=(2x-3y+2)^2
2a^(n+1) -12a^n+18a^(n-1)
=2a^(n-1)(a-3)^2
mx²-ym²+yn²-xn²
x²+2xy+y²-4x²+4y²+4(x²+2xy+y²)
=x²+2xy+y²-4x²+4y²+4x²+8xy+4y²
=x²+12xy+9y²
4+8x-12y+9y²-12xy+4x²
m²(x-y)+n²(y-x)
=(m²-n²)(x-y)
(x+y)²-4(x²-y²)+4(x-y)² 完全平方
=(x+y-2)²
4(1+2x-3y)+(3y-2x)²
=4+4(-2x+3y)+(3y-2x)² 完全平方
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m²(x-y)+n²(y-x)
=(m²-n²)(x-y)
(x+y)²-4(x²-y²)+4(x-y)² 完全平方
=(x+y-2)²
4(1+2x-3y)+(3y-2x)²
=4+4(-2x+3y)+(3y-2x)² 完全平方
=(3y-2x+2)²
2*a∧(n+1)-a∧n+18*a∧(n-1)
=2*(a∧n*n)-a∧n+18*(a∧n/n)
=2*a∧n*2n-a∧n+18*a∧n/18n
=a∧n(4n-1+1/n)
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