初二数学因式分解，急急急！谢谢
计算：【写过程】(1)(2a)^3·b^4÷12a^3b^2(2)(-2/3a^7b^5)÷3/2a^2b^5(3)(6/5a^3x^4-0.9ax^3)÷3/5ax^3...
计算：【写过程】
(1) (2a)^3·b^4 ÷12a^3 b^2 (2) (-2/3a^7 b^5) ÷ 3/2 a^2 b^5
(3)(6/5 a^3 x^4-0.9ax^3)÷3/5ax^3 (4) (7x^2 y^3-8x^3 y^2 z)÷8x^2 y^2 展开
(1) (2a)^3·b^4 ÷12a^3 b^2 (2) (-2/3a^7 b^5) ÷ 3/2 a^2 b^5
(3)(6/5 a^3 x^4-0.9ax^3)÷3/5ax^3 (4) (7x^2 y^3-8x^3 y^2 z)÷8x^2 y^2 展开
1个回答
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(1) (2a)^3·b^4 ÷12a^3 b^2
=8a³b^4÷12a³b²
=2/3b²
(2) (-2/3a^7 b^5) ÷ 3/2 a^2 b^5
=-4/9a^5
(3)(6/5 a^3 x^4-0.9ax^3)÷3/5ax^3
=2a²x-3/2
(4) (7x^2 y^3-8x^3 y^2 z)÷8x^2 y^2
=7/8y-xz
=8a³b^4÷12a³b²
=2/3b²
(2) (-2/3a^7 b^5) ÷ 3/2 a^2 b^5
=-4/9a^5
(3)(6/5 a^3 x^4-0.9ax^3)÷3/5ax^3
=2a²x-3/2
(4) (7x^2 y^3-8x^3 y^2 z)÷8x^2 y^2
=7/8y-xz
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