题目

因式分解(会几道做几道）
y^2+(a^2+b^2)y+a^2b^2
abx^2-（ac-b^2)x-bc
6x^2+31x-105
3x^4-7x^2y^2-20y^4
6a^4n+k-a^2n+k-35a^k
13x^3-53x^2-8x
x(x-1)(x+1)(x+2）-24
(x+1)(x+2)(x+3)(x+4)-24

提问时间：2020-12-10

答案

y^2+(a^2+b^2)y+a^2b^2=(y+a^2)(y+b^2) 1/3x(x-8)(x+3) x(x - 1)(x + 1)(x + 2) - 24 = x(x^2 - 1)(x + 2) - 24 = x(x^3 + 2x^2 - x - 2) - 24 = x^4 + 2x^3 - x^2 - 2x - 24 = (x^4 - 2x^3) + 4x^3 - x^2 - 2x - 24...