(1)(a一2²+4b(a一b)(2)ab(ab一6)+9(3)(-2a²b³)÷(-6ab²)x(-4a²b)(4)18a³一2a(5)m²一n²+2m一2n
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![(1)(a一2²+4b(a一b)(2)ab(ab一6)+9(3)(-2a²b³)÷(-6ab²)x(-4a²b)(4)18a³一2a(5)m²一n²+2m一2n](/uploads/image/z/5911989-69-9.jpg?t=%EF%BC%881%EF%BC%89%EF%BC%88a%E4%B8%802%26%23178%3B%2B4b%EF%BC%88a%E4%B8%80b%EF%BC%89%EF%BC%882%EF%BC%89ab%EF%BC%88ab%E4%B8%806%EF%BC%89%2B9%EF%BC%883%EF%BC%89%EF%BC%88-2a%26%23178%3Bb%26%23179%3B%EF%BC%89%C3%B7%EF%BC%88-6ab%26%23178%3B%EF%BC%89x%EF%BC%88-4a%26%23178%3Bb%EF%BC%89%EF%BC%884%EF%BC%8918a%26%23179%3B%E4%B8%802a%EF%BC%885%EF%BC%89m%26%23178%3B%E4%B8%80n%26%23178%3B%2B2m%E4%B8%802n)
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(1)(a一2²+4b(a一b)(2)ab(ab一6)+9(3)(-2a²b³)÷(-6ab²)x(-4a²b)(4)18a³一2a(5)m²一n²+2m一2n
(1)(a一2²+4b(a一b)
(2)ab(ab一6)+9
(3)(-2a²b³)÷(-6ab²)x(-4a²b)
(4)18a³一2a
(5)m²一n²+2m一2n
(1)(a一2²+4b(a一b)(2)ab(ab一6)+9(3)(-2a²b³)÷(-6ab²)x(-4a²b)(4)18a³一2a(5)m²一n²+2m一2n
(1) (a一2²+4b(a一b) 这个有问题
(a一2b)²+4b(a一b)
=a²-4ab+4b²+4ab-4b²
=a²
(2)ab(ab一6)+9
=(ab)²-6ab+9
=(ab-3)²
(3) (-2a²b³)÷(-6ab²)x(-4a²b)
=(-2a²b³)x(-4a²b)÷(-6ab²)
=-4a³b²/3
(4)18a³一2a
=2a(9a²-1)
=2a(3a+1)(3a-1)
(5)m²一n²+2m一2n
=(m+n)(m-n)+2(m-n)
=(m-n)(m+n+2)