因式分解 (1)4a(2x-y)^2-36a (2)20a^2b^2-2ab+5 (3)3a(x^2+4)^2-48ax^2(2)20a^2b^2-20ab+5 不好意思打错了

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因式分解(1)4a(2x-y)^2-36a(2)20a^2b^2-2ab+5(3)3a(x^2+4)^2-48ax^2(2)20a^2b^2-20ab+5不好意思打错了因式分解(1)4a(2x-y)^

因式分解 (1)4a(2x-y)^2-36a (2)20a^2b^2-2ab+5 (3)3a(x^2+4)^2-48ax^2(2)20a^2b^2-20ab+5 不好意思打错了
因式分解 (1)4a(2x-y)^2-36a (2)20a^2b^2-2ab+5 (3)3a(x^2+4)^2-48ax^2
(2)20a^2b^2-20ab+5 不好意思打错了

因式分解 (1)4a(2x-y)^2-36a (2)20a^2b^2-2ab+5 (3)3a(x^2+4)^2-48ax^2(2)20a^2b^2-20ab+5 不好意思打错了
(1)4a(2x-y)^2-36a
=4a[(2x-y)^2-9]
=4a(2x-y+3)(2x-y-3)
(2)20a^2b^2-2ab+5
不能分解
(3)3a(x^2+4)^2-48ax^2
=3a[(x^2+4)^2-16x^2]
=3a(x^2+4x+4)(x^2-4x+4)
=3a(x+2)^2(x-2)^2

(1)4a(2x-y)^2-36a
=4a[(2x-y)^2-9]
=4a[(2x-y)^2-3^2]
=4a(2x-y+3)(2x-y-3)
(2)20a^2b^2-2ab+5
这道题打错了没有?应该分解不了!!!
(3)3a(x^2+4)^2-48ax^2
=3a[(x^2+4)^2-16x^2]
=3a[(x^2+4)^2-(4x)^2]
=3a(x^2+4+4x)(x^2+4-4x)
=3a(x+2)^2(x-2)^2

(1)4a(2x-y)^2-36a
=4a[(2x-y)^2-9]
=4a(2x-y-3)(2x-y+3)
(2)20a^2b^2-2ab+5
=(2ab-1)(10ab-5 )
3)3a(x^2+4)^2-48ax^2
=3a[(x^2+4)^2-16x^2]
=3a[(x^2+4)^2-(4x)^2]
=3a(x^2+4+4x)(x^2+4-4x)
=3a(x+2)^2(x-2)^2

1 4a(2x-y+3)(2x-y-3)
2 20(ab-1/5+根号3 /10)(ab-1/5-根号3 /10)
3 3a(x-2)^2(x+2)^2