因式分解:(a+1)^2+a+1 (x+y)^2-4x^2

2024-12-20 00:45:06
推荐回答(5个)
回答1:

第一个(a+1)(a+2)
第二个=x^2+2xy-4x^2+y^2=y^2+2xy-3x^2=(y-x)(y+3x)

回答2:

第一题:a^2+3a+2 第二题:-3x^2+2xy+y^2

回答3:

(a+1)^2+a+1
=(a+1)(a+1+1)
=(a+1)(a+2)

(x+y)^2-4x^2
=[(x+y)-2x][(x+y)+2x]
=(y-x)(3x+y)

回答4:

(a+1)^2+a+1
=(a+1)(a+1+1)=(a+1)(a+2)
(x+y)^2-4x^2
=(x+y)^2-(2x)^2
=(x+y+2x)(x+y-2x)
=(3x+y)(y-x)

回答5:

a^2+2a+1+a+1=a^2+3a+2
x^2+2xy+y^2-4x^2=-2x^2+2xy+y^2