(1)2m(y-x)²=( )(x-y)²(2)-2m(y-x)³=( )(x-y)³(3)(x-y)(y-x)=-(x+y)( )(4)-m(y-x²)=m( )
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(1)2m(y-x)²=( )(x-y)²(2)-2m(y-x)³=( )(x-y)³(3)(x-y)(y-x)=-(x+y)( )(4)-m(y-x²)=m( )
(1)2m(y-x)²=( )(x-y)²
(2)-2m(y-x)³=( )(x-y)³
(3)(x-y)(y-x)=-(x+y)( )
(4)-m(y-x²)=m( )
(1)2m(y-x)²=( )(x-y)²(2)-2m(y-x)³=( )(x-y)³(3)(x-y)(y-x)=-(x+y)( )(4)-m(y-x²)=m( )
答:
(1)2m(y-x)²=(2m )(x-y)²
平方提取负号不变
(2)-2m(y-x)³=( 2m )(x-y)³
立方提取负号要变
(3)(x-y)(y-x)=-(x+y)( )
题目不对
(x-y)(y-x)=-(x-y)(x-y)
(4)-m(y-x²)=m( x²-y )
提取负号
1)2m(y-x)²=(2m )(x-y)²
2)-2m(y-x)³=( 2m )(x-y)³
3)(x-y)(y-x)=-(x+y)(x-y )
4)-m(y-x²)=m(x²-y )
【参考答案】
(1)2m(y-x)²=(2m )(x-y)²
(2)-2m(y-x)³=( 2m )(x-y)³
(3)(x-y)(y-x)=-(x-y)( y-x )
(4)-m(y-x²)=m( x^2 -y )
(1)2m(y-x)²=【2m】(x-y)²
(2)-2m(y-x)³=【2m】(x-y)³
(3)(x-y)(y-x)=-(x+y)() 【题目出错了】
(4)-m(y-x²)=m【x²-y】
-2m
x+y
x^2-y
(1)2m
(2)2m
(3)好像有点问题
(4)X^2-y
(3)