分解因式 (1)ab(c²-d²)+cd(a²-b²) (2)x²-4mx+8mn-4n²(3)x四次方+64 (4)x³-11x²+31
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分解因式 (1)ab(c²-d²)+cd(a²-b²) (2)x²-4mx+8mn-4n²(3)x四次方+64 (4)x³-11x²+31
分解因式 (1)ab(c²-d²)+cd(a²-b²) (2)x²-4mx+8mn-4n²
(3)x四次方+64 (4)x³-11x²+31
分解因式 (1)ab(c²-d²)+cd(a²-b²) (2)x²-4mx+8mn-4n²(3)x四次方+64 (4)x³-11x²+31
(1)ab(c²-d²)+cd(a²-b²) =(ac-bd)(bc+ad)
(2)x²-4mx+8mn-4n²=(x-2n)(x+2n-4m)
(3)x四次方+64=(x^2-4x+8)(x^2+4x+8)
(4)x³-11x²+31=
(1) (ac-bd)(bc+ad)
(2) (x-2n)(x+2n-4m)
(3) (x^2+4x+8)(x^2-4x+8)