把下列各式因式分解: (1)2x2﹣4x ; (2)a2b2﹣a2c2; (3)8a3b2﹣12ab3c+6a3b2c; (4)8a(x﹣a)+4b(a﹣x)﹣6c(x﹣a); (5)﹣x5y3+x3y5; (6)(a+b)2﹣9(a﹣b)2; (7)﹣8ax2+16axy﹣8ay2; (8)5m(x﹣y)2+10n(y﹣x)3; (9)(a2+1)2﹣4a2; (10)m2+2n﹣mn﹣2m; (11)(a2﹣4a+4)﹣c2; (12)x2+6x﹣27; (13)9+6(a+b)+(a+b)2; (14)(x+3y)2+(2x+6y)(3y﹣4x)+(4x﹣3y)2。 |