(1)-x+2y-1的相反数是( )(2)求多项式2x²-3x-1与x²-3x-2的差.可列出算式( ),可化简为( )(3)2a+3(b-c)=( )(去掉括号)2a-3(b-c)=x²-xy+y²=x²-( )x²-xy+y²=x
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![(1)-x+2y-1的相反数是( )(2)求多项式2x²-3x-1与x²-3x-2的差.可列出算式( ),可化简为( )(3)2a+3(b-c)=( )(去掉括号)2a-3(b-c)=x²-xy+y²=x²-( )x²-xy+y²=x](/uploads/image/z/611859-3-9.jpg?t=%EF%BC%881%EF%BC%89-x%2B2y-1%E7%9A%84%E7%9B%B8%E5%8F%8D%E6%95%B0%E6%98%AF%EF%BC%88+%EF%BC%89%EF%BC%882%EF%BC%89%E6%B1%82%E5%A4%9A%E9%A1%B9%E5%BC%8F2x%26%23178%3B-3x-1%E4%B8%8Ex%26%23178%3B-3x-2%E7%9A%84%E5%B7%AE.%E5%8F%AF%E5%88%97%E5%87%BA%E7%AE%97%E5%BC%8F%EF%BC%88+%EF%BC%89%2C%E5%8F%AF%E5%8C%96%E7%AE%80%E4%B8%BA%EF%BC%88+%EF%BC%89%EF%BC%883%EF%BC%892a%2B3%EF%BC%88b-c%EF%BC%89%3D%EF%BC%88+%EF%BC%89%EF%BC%88%E5%8E%BB%E6%8E%89%E6%8B%AC%E5%8F%B7%EF%BC%892a-3%EF%BC%88b-c%EF%BC%89%3Dx%26%23178%3B-xy%2By%26%23178%3B%3Dx%26%23178%3B-%EF%BC%88+%EF%BC%89x%26%23178%3B-xy%2By%26%23178%3B%3Dx%26%2317)
(1)-x+2y-1的相反数是( )(2)求多项式2x²-3x-1与x²-3x-2的差.可列出算式( ),可化简为( )(3)2a+3(b-c)=( )(去掉括号)2a-3(b-c)=x²-xy+y²=x²-( )x²-xy+y²=x
(1)-x+2y-1的相反数是( )
(2)求多项式2x²-3x-1与x²-3x-2的差.可列出算式( ),可化简为( )
(3)2a+3(b-c)=( )(去掉括号)
2a-3(b-c)=
x²-xy+y²=x²-( )
x²-xy+y²=x²+( )
(1)-x+2y-1的相反数是( )(2)求多项式2x²-3x-1与x²-3x-2的差.可列出算式( ),可化简为( )(3)2a+3(b-c)=( )(去掉括号)2a-3(b-c)=x²-xy+y²=x²-( )x²-xy+y²=x
(1)-x+2y-1的相反数是(x-2y+1 )
(2)求多项式2x²-3x-1与x²-3x-2的差.可列出算式(2x²-3x-1-(x²-3x-2) ),可化简为(x²+1 )
(3)2a+3(b-c)=(2a+3b-3c) )(去掉括号)
2a-3(b-c)=2a-3b+3c
x²-xy+y²=x²-( xy-y²)
x²-xy+y²=x²+(-xy+y² )
(1)-x+2y-1的相反数是:-(-x+2y-1)=x-2y+1
(2)求多项式2x²-3x-1与x²-3x-2的差。可列出算式(2x²-3x-1-(x²-3x-2)),可化简为(x²+1 )
(3)2a+3(b-c)=(2a+3b-3c)(去掉括号)
2a-3(b-c)=2a-3b+3c
x²-x...
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(1)-x+2y-1的相反数是:-(-x+2y-1)=x-2y+1
(2)求多项式2x²-3x-1与x²-3x-2的差。可列出算式(2x²-3x-1-(x²-3x-2)),可化简为(x²+1 )
(3)2a+3(b-c)=(2a+3b-3c)(去掉括号)
2a-3(b-c)=2a-3b+3c
x²-xy+y²=x²-( xy-y²)
x²-xy+y²=x²+(y² -xy)
就这样,哦了O(∩_∩)O
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