1.x^3-3x+22.3x^3+7x^2-43.y^5-11y^3+y4.a^2-4ab+3b^2+2bc-c^25.a^4+a_数学解答

1.x^3-3x+2
2.3x^3+7x^2-4
3.y^5-11y^3+y
4.a^2-4ab+3b^2+2bc-c^2
5.a^4+a^2b^2+b^4
6.4x^4+1(7)x^4+4y^4
7.a^5+a+1
8.x^3+6x^2+11x+6
10.x^3-9x+8

人气：468 ℃　时间：2020-04-14 04:52:28

解答

1 x^3-3x+2 =(x^3-1)-3x+3 =(x-1)(x^2+x+1)-3(x-1) =(x-1)(x^2+x-2) =(x-1)(x-1)(x+2)2 3x^3+7x^2-4=(3x^3+3x^2)+(4x^2-4) =3x^2(x+1)+4(x^2-1) =3x^2(x+1)+4(x+1)(x-1) =(x+1)(3x^2+4x-4) =(x+1)(x+2)(3x-2) 3 原式...