(-9a^2b^2c)^2÷(3ab^2)=

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lz_sai 共回答了18个问题 | 采纳率88.9%
(-9a^2b^2c)^2÷(3ab^2)
=81a^4 b^4 c^2÷(3ab^2)
=27a^3 b^2 c^2
1年前

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1,原式=3a^2(2a-3b^2C)
2.原式=-2m(m^2-4m+3)
=-2m(m-3)(m-1)
3.原式=1/2ab(ab^2-4a+6b)
4.原式=(x+y)(3a-2b)
5.原式=3x(x-y)(x-2)
6.原式=5a(a-b)[(a-b)^2+3a]
=5a(a-b)(a^2-2ab+b^2+3a)