题目内容
因式分解:
(1)3x2-27=______;
(2)4x3-36x=______;
(3)a2b-4b3=______;
(4)x2y2-x4y2=______.
(1)3x2-27=______;
(2)4x3-36x=______;
(3)a2b-4b3=______;
(4)x2y2-x4y2=______.
(1)3x2-27=3(x2-9)=3(x+3)(x-3);
(2)4x3-36x=4x(x2-9)=4x(x+3)(x-3);
(3)a2b-4b3=b(a2-4b2)=b(a+2b)(a-2b);
(4)x2y2-x4y2=x2y2(1-x2)=x2y2(1-x)(1+x).
故答案为:(1)3(x+3)(x-3);(2)4x(x+3)(x-3);(3)b(a+2b)(a-2b);(4)x2y2(1-x)(1+x).
(2)4x3-36x=4x(x2-9)=4x(x+3)(x-3);
(3)a2b-4b3=b(a2-4b2)=b(a+2b)(a-2b);
(4)x2y2-x4y2=x2y2(1-x2)=x2y2(1-x)(1+x).
故答案为:(1)3(x+3)(x-3);(2)4x(x+3)(x-3);(3)b(a+2b)(a-2b);(4)x2y2(1-x)(1+x).
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