① a平方(x-1)平方+4a(1-x)=a²(x-1)²-4a(x-1)=a(x-1)(ax-a-4)
② 5(y-x)平方+3(x-y)=5(y-x)²-3(y-x)=(y-x)(5y-5x-3)
③ 5(x-y)立方+10(y-x)平方=5(x-y)³-10(x-y)²=5(x-y)²(x-y-2)
① a平方(x-1)平方+4a(1-x)=a²(x-1)²-4a(x-1)=a(x-1)(ax-a-4)
② 5(y-x)平方+3(x-y)=5(y-x)²-3(y-x)=(y-x)(5y-5x-3)
③ 5(x-y)立方+10(y-x)平方=5(x-y)³-10(x-y)²=5(x-y)²(x-y-2)