把下列各式分解因式:(1)ax+ay(2)x3y2-x2y3(3)a3-2a2b+ab2(4)-a3+15a...
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发布时间:2024-10-04 10:43
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时间:2024-10-05 13:55
(1)ax+ay=a(x+y);
(2)x3y2-x2y3=x2y2(x-y);
(3)a3-2a2b+ab2
=a(a2-2ab+b2)
=a(a-b)2;
(4)-a3+15ab2-9ac2=-(a2-15b2+9c2);
(5)(x2+4)2-16x2
=(x2+4x+4)(x2-4x+4)
=(x+2)2(x-2)2;
(6)(x+y)2-14(x+y)+49=(x+y-7)2.