①(-2ab)^2*(-a)^2+(2ab)^2*(-a)3*b ②(-4a^2b)^3*(ac^2)2-(2a^4c^2)*(-a^2b^2)*c ③(-a^5)/(-a)^2+(-3a^2)(-2a)④6x^2-(x-1)(x+2)-2(x-1)(x+3)⑤15x^8y^2z^4/(-3x^4yz^3)/(-4x^2y)⑥(0.16mn^4-0.6m^2n^3+1.4mn^3)/(-2/5mn^3)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/15 02:36:24
![①(-2ab)^2*(-a)^2+(2ab)^2*(-a)3*b ②(-4a^2b)^3*(ac^2)2-(2a^4c^2)*(-a^2b^2)*c ③(-a^5)/(-a)^2+(-3a^2)(-2a)④6x^2-(x-1)(x+2)-2(x-1)(x+3)⑤15x^8y^2z^4/(-3x^4yz^3)/(-4x^2y)⑥(0.16mn^4-0.6m^2n^3+1.4mn^3)/(-2/5mn^3)](/uploads/image/z/5228594-26-4.jpg?t=%E2%91%A0%28-2ab%29%5E2%2A%28-a%29%5E2%2B%282ab%29%5E2%2A%28-a%293%2Ab+%E2%91%A1%28-4a%5E2b%29%5E3%2A%28ac%5E2%292-%282a%5E4c%5E2%29%2A%28-a%5E2b%5E2%29%2Ac+%E2%91%A2%28-a%5E5%29%2F%28-a%29%5E2%2B%28-3a%5E2%29%28-2a%29%E2%91%A36x%5E2-%28x-1%29%28x%2B2%29-2%28x-1%29%28x%2B3%29%E2%91%A415x%5E8y%5E2z%5E4%2F%28-3x%5E4yz%5E3%29%2F%28-4x%5E2y%29%E2%91%A5%280.16mn%5E4-0.6m%5E2n%5E3%2B1.4mn%5E3%29%2F%28-2%2F5mn%5E3%EF%BC%89)
①(-2ab)^2*(-a)^2+(2ab)^2*(-a)3*b ②(-4a^2b)^3*(ac^2)2-(2a^4c^2)*(-a^2b^2)*c ③(-a^5)/(-a)^2+(-3a^2)(-2a)④6x^2-(x-1)(x+2)-2(x-1)(x+3)⑤15x^8y^2z^4/(-3x^4yz^3)/(-4x^2y)⑥(0.16mn^4-0.6m^2n^3+1.4mn^3)/(-2/5mn^3)
①(-2ab)^2*(-a)^2+(2ab)^2*(-a)3*b ②(-4a^2b)^3*(ac^2)2-(2a^4c^2)*(-a^2b^2)*c
③(-a^5)/(-a)^2+(-3a^2)(-2a)
④6x^2-(x-1)(x+2)-2(x-1)(x+3)
⑤15x^8y^2z^4/(-3x^4yz^3)/(-4x^2y)
⑥(0.16mn^4-0.6m^2n^3+1.4mn^3)/(-2/5mn^3)
①(-2ab)^2*(-a)^2+(2ab)^2*(-a)3*b ②(-4a^2b)^3*(ac^2)2-(2a^4c^2)*(-a^2b^2)*c ③(-a^5)/(-a)^2+(-3a^2)(-2a)④6x^2-(x-1)(x+2)-2(x-1)(x+3)⑤15x^8y^2z^4/(-3x^4yz^3)/(-4x^2y)⑥(0.16mn^4-0.6m^2n^3+1.4mn^3)/(-2/5mn^3)
①(-2ab)^2*(-a)^2+(2ab)^2*(-a)3*b
=(2ab)^2*a^2-(2ab)^2*a^3*b
=(2ab)^2*a^2*(1-ab)
②(-4a^2b)^3*(ac^2)2-(2a^4c^2)*(-a^2b^2)*c
=-64a^6b^3*a^2c^4+2a^4c^2*a^2b^2*c
=2a^6b^2c^3-64a^8b^3c^4
=2a^6b^2c^3(1-32a^2bc)
③(-a^5)/(-a)^2+(-3a^2)(-2a)
=-a^5/a^2+3a^2*2a
=-a^3+6a^3
=5a^3
④6x^2-(x-1)(x+2)-2(x-1)(x+3)
=6x^2-(x^2+x-2)-2(x^2+2x-3)
=6x^2-x^2-x+2-2x^2-4x+6
=3x^2-5x+8
⑤15x^8y^2z^4/(-3x^4yz^3)/(-4x^2y)
=15/3/4*x^8/x^4/x^2*y^2/y/y*z^4/z^3
=5/4*x^2z
⑥(0.16mn^4-0.6m^2n^3+1.4mn^3)/(-2/5mn^3)
=0.2mn^3(8n-3m+7)*5/(2mn^3)
=(8n-3m+7)/2