数学问题(整式的运算)一、填空题( )(3x-y²)=y^4-9x²( -3分之1y)²=4分之9x²-xy+ ------( )²=16分之9a²-6ab+ ------(a+b-1)(a-b+1)=( )²-( )²如果x²+(m-2)x
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![数学问题(整式的运算)一、填空题( )(3x-y²)=y^4-9x²( -3分之1y)²=4分之9x²-xy+ ------( )²=16分之9a²-6ab+ ------(a+b-1)(a-b+1)=( )²-( )²如果x²+(m-2)x](/uploads/image/z/1238768-8-8.jpg?t=%E6%95%B0%E5%AD%A6%E9%97%AE%E9%A2%98%EF%BC%88%E6%95%B4%E5%BC%8F%E7%9A%84%E8%BF%90%E7%AE%97%EF%BC%89%E4%B8%80%E3%80%81%E5%A1%AB%E7%A9%BA%E9%A2%98%EF%BC%88+%EF%BC%89%EF%BC%883x-y%26%23178%3B%EF%BC%89%3Dy%5E4-9x%26%23178%3B%EF%BC%88+-3%E5%88%86%E4%B9%8B1y%EF%BC%89%26%23178%3B%3D4%E5%88%86%E4%B9%8B9x%26%23178%3B-xy%2B+------%EF%BC%88+%EF%BC%89%26%23178%3B%3D16%E5%88%86%E4%B9%8B9a%26%23178%3B-6ab%2B+------%EF%BC%88a%2Bb-1%EF%BC%89%EF%BC%88a-b%2B1%EF%BC%89%3D%EF%BC%88+%EF%BC%89%26%23178%3B-%EF%BC%88+%EF%BC%89%26%23178%3B%E5%A6%82%E6%9E%9Cx%26%23178%3B%2B%EF%BC%88m-2%EF%BC%89x)
数学问题(整式的运算)一、填空题( )(3x-y²)=y^4-9x²( -3分之1y)²=4分之9x²-xy+ ------( )²=16分之9a²-6ab+ ------(a+b-1)(a-b+1)=( )²-( )²如果x²+(m-2)x
数学问题(整式的运算)
一、填空题
( )(3x-y²)=y^4-9x²
( -3分之1y)²=4分之9x²-xy+ ------
( )²=16分之9a²-6ab+ ------
(a+b-1)(a-b+1)=( )²-( )²
如果x²+(m-2)x+9是一个完全平方式,则m= ----
1、(-3)²-(3.14-π)^0+(-1²)³
2、(a+1)(a-2分之1)
3、3a²(a²-2a+1)-2a²(a-3)
4、[(m-n)²*(m-n)³]²÷(m-n)^4
5、(-x+2分之1)(-x-2分之1)
6、[-cd+2分之1]²
7、(2x+y+1)(2x+y-1)
8、(2x-y)²-4(x-y)(x+2y)
数学问题(整式的运算)一、填空题( )(3x-y²)=y^4-9x²( -3分之1y)²=4分之9x²-xy+ ------( )²=16分之9a²-6ab+ ------(a+b-1)(a-b+1)=( )²-( )²如果x²+(m-2)x
( 3x+y² )(3x-y²)=y^4-9x²
(3/2x -3分之1y)²=4分之9x²-xy+ ------
( 3/4a-2b )²=16分之9a²-6ab+ ------
(a+b-1)(a-b+1)=( a )²-(b-1 )²
如果x²+(m-2)x+9是一个完全平方式,则m=-4或8 ----
1、(-3)²-(3.14-π)^0+(-1²)³
=9-1-1
=7
2、(a+1)(a-2分之1)
=a²+1/2a-1/2
3、3a²(a²-2a+1)-2a²(a-3)
=a²(3a²-6a+3)-2a+6)
=a²(3a²-8a+9)
=3a^4-8a³+9a²
4、[(m-n)²*(m-n)³]²÷(m-n)^4
=(m-n)^6
5、(-x+2分之1)(-x-2分之1)
=x²-1/4
6、[-cd+2分之1]²
=(cd)²-cd+1/4
7、(2x+y+1)(2x+y-1)
=(2x+y)²-1
=4x ²+4xy+y²-1
8、(2x-y)²-4(x-y)(x+2y)
= (4x²-4xy-y²)-4x²-4xy+8y²
=7y²-8xy
这初中的把