1.4x(y-x)-y②

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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】

4x(y-x)-y②=4xy-4x②-y②=-(2x-y)②
3x②-1/3=3(x②-1/9)=3(x+1/3)(x-1/3)
(x②+y②)②-4x②y②= (x②-y②)②
2x②+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-b)(3a+b)②-(a-b)(a+3b)②=(a-b)(8a②-8b②)=8(a-b)②(a+b)
x②+y②-1-2xy=(x-y)②-1=(x-y-1)(x-y+1)
a②-b②-4a=4b (a-2)②-4=(b+2)②-4 (a-2)②=(b+2)② (a+b)(a-b-4)=0

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