1.4x(y-x)-y②

题目

1.4x(y-x)-y②
2.3x②-1/3
3.(x②+y②)②-4x②y②
4.2x②+2x+1/2
5.2a(x②+1)②-2ax②
6.(a-b)(3a+b)②+(a+3b)②(b-a)
7.x②+y②-1-2xy
8.a②-b②-4a=4b
我最不擅长分式因解
回答完的我会加分.怕没人接.
还有.最好有过程.3q
【注：①②③为平方数】

答案

4x(y-x)-y②=4xy-4x②-y②=-(2x-y)②3x②-1/3=3(x②-1/9)=3(x+1/3)(x-1/3) (x②+y②)②-4x②y②= (x②-y②)②2x②+2x+1/2=2(x②+x+1/4)=2(x+1/2)② 2a(x②+1)②-2ax②=2a(x^4+x^2+1)(a-b)(3a+b)②+(a+3b)②(b-a)=(a-...