(1)ba?ab(2)aab2?ba2b(3)1a?b+1a+b(4)m-2+1m?2(5)xx?y?xy(6)m?15...
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发布时间:2024-10-20 11:57
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时间:2024-11-08 20:26
(1)原式=b2?a2ab;
(2)原式=a3?b3a2b2;
(3)原式=a+b+a?b(a?b)(a+b)
=2a(a?b)(a+b);
(4)原式=(m?2)2+1m?2
=m2?4m+5m?2;
(5)原式=xyy(x?y)-x(x?y)y(x?y)
=xy?x2+xyy(x?y)
=x(2y?x)y(x?y);
(6)原式=m?15(m+3)(m?3)-3(m?3)(m+3)(m?3)
=m?15?3m+9(m+3)(m?3)
=?2(m+3)(m+3)(m?3)
=23?m.