(x-1)(x+1)(x+3)(x+5)+1 因式分解

快快 因式分解
2024-12-03 12:06:31
推荐回答(2个)
回答1:

解:原试=(X-1)(X+5)(X+1)(X+3)+1
=(X^2+4X-5)(X^2+4X+3)+1
=(X^2+4x)^2-2(x^2+4x)-14
=(x^2+4x-1)^2-15
=(x^2+4x-1+根号15)(X^2+4X-1-根号15)

回答2:

(x-1)(x+1)(x+3)(x+5)+1
=(x^2+4x+5)(x^2+4x+3)+1
=(x^2+4x)^2+8(x^2+4x)+15+1
=(x^2+4x)^2+8(x^2+4x)+16
=(x^2+4x+4)^2
=(x+2)^4