1:分解因式4(x+2y)²-25(x-y)²=...2:把9(x-y)+12(x²-y&
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1:分解因式4(x+2y)²-25(x-y)²=...2:把9(x-y)+12(x²-y²)+4(x+y)²因式分
分解因式(x+y)^m+1-(x+y)^m-1
4:分解因式-3y^4+10y²+8=..
分解因式(x+y)^m+1-(x+y)^m-1
4:分解因式-3y^4+10y²+8=..
(x+2y)²-25(x-y)²
=(x+2y+5x-5y)(x+2y-5x+5y)
=(6x-3y)(7y-4x)
=3(2x-y)(7y-4x)
9(x-y)²+12(x²-y²)+4(x+y)²
=(3x-3y+2x+2y)^2
=(5x-y)^2
(x+y)^m+1-(x+y)^m-1
=(x+y)^m-1(x+y+1)(x+y-1)
-3y^4+10y²+8
=-(3y^2+2)(y^2-4)
=-(3y^2+2)(y+2)(y-2)
=(x+2y+5x-5y)(x+2y-5x+5y)
=(6x-3y)(7y-4x)
=3(2x-y)(7y-4x)
9(x-y)²+12(x²-y²)+4(x+y)²
=(3x-3y+2x+2y)^2
=(5x-y)^2
(x+y)^m+1-(x+y)^m-1
=(x+y)^m-1(x+y+1)(x+y-1)
-3y^4+10y²+8
=-(3y^2+2)(y^2-4)
=-(3y^2+2)(y+2)(y-2)
1:分解因式4(x+2y)²-25(x-y)²=...2:把9(x-y)+12(x²-y&
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