1..(x-y)^2-(x+y)(x-y) 2..-2(a-1)^3+12(a-1)^3+18(1-a)求你了
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1..(x-y)^2-(x+y)(x-y)2..-2(a-1)^3+12(a-1)^3+18(1-a)求你了1..(x-y)^2-(x+y)(x-y)2..-2(a-1)^3+12(a-1)^3+18
1..(x-y)^2-(x+y)(x-y) 2..-2(a-1)^3+12(a-1)^3+18(1-a)求你了
1..(x-y)^2-(x+y)(x-y) 2..-2(a-1)^3+12(a-1)^3+18(1-a)求你了
1..(x-y)^2-(x+y)(x-y) 2..-2(a-1)^3+12(a-1)^3+18(1-a)求你了
1..(x-y)^2-(x+y)(x-y)
=(x-y)[(x-y)-(x+y)]
=-2y(x-y)
2..-2(a-1)^3+12(a-1)^2+18(1-a)
=-2(a-1)^3+12(a-1)^2-18(a-1)
=-2(a-1)[(a-1)^2-6(a-1)+9]
=-2(a-1)(a-1-3)^2
=-2(a-1)(a-4)^2
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
(x-y)(x-y)2(y-x) (x+2y-?)(x-2y+?)
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【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2)/2(x-y)^2
(x-y/x+2y)³
因式分解x(x+y)(x-y)-x(x+y)^2
{(x,y) |x|+|y|
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