问题描述:
分解下列因式:
(1)m2-n2+2m-2n
(2)1-x2-y2+2xy
(3)x2-(k+3)x+(k+2)
(4)(m2-1)(n2-1)+4mn.
(1)m2-n2+2m-2n
(2)1-x2-y2+2xy
(3)x2-(k+3)x+(k+2)
(4)(m2-1)(n2-1)+4mn.
问题解答:
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