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](/uploads/image/z/1658257-25-7.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3+%281%294a%282x-y%29%5E2-36a+%282%2920a%5E2b%5E2-2ab%2B5+%283%293a%28x%5E2%2B4%29%5E2-48ax%5E2%282%2920a%5E2b%5E2-20ab%2B5+%E4%B8%8D%E5%A5%BD%E6%84%8F%E6%80%9D%E6%89%93%E9%94%99%E4%BA%86)
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