1.(x+y)(a+2b)2.(2a+3)(3\2b+5)3.(2x+3)(-x-1)4.(-2m-1)(3m-2)5.(x-y)平方6.(-2-3)平方
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![1.(x+y)(a+2b)2.(2a+3)(3\2b+5)3.(2x+3)(-x-1)4.(-2m-1)(3m-2)5.(x-y)平方6.(-2-3)平方](/uploads/image/z/12070295-71-5.jpg?t=1.%EF%BC%88x%2By%29%28a%2B2b%292.%282a%2B3%29%283%5C2b%2B5%293.%282x%2B3%29%28-x-1%294.%28-2m-1%29%283m-2%295.%28x-y%29%E5%B9%B3%E6%96%B96.%28-2-3%29%E5%B9%B3%E6%96%B9)
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1.(x+y)(a+2b)2.(2a+3)(3\2b+5)3.(2x+3)(-x-1)4.(-2m-1)(3m-2)5.(x-y)平方6.(-2-3)平方
1.(x+y)(a+2b)
2.(2a+3)(3\2b+5)
3.(2x+3)(-x-1)
4.(-2m-1)(3m-2)
5.(x-y)平方
6.(-2-3)平方
1.(x+y)(a+2b)2.(2a+3)(3\2b+5)3.(2x+3)(-x-1)4.(-2m-1)(3m-2)5.(x-y)平方6.(-2-3)平方
1.=ax+ay+2bx+2by
2.=3ab+9/2b+10a+15
3.=-2x^2-5x-3
4.=-6m^2+m+2
5.=x^2-2xy+y^2
6.=5^2=25
你是要化简吗?化简应该很简单的——
1.(x+y)(a+2b)=ax+2bx+ay+2by
2.(2a+3)(3\2b+5)=6a+9\2b+10a+15
3.(2x+3)(-x-1)=-2x^2(n^2表示n的二次方)-5x-3
4.(-2m-1)(3m-2)=-6m^2+m+2
5.(x-y)平方=x^2-2xy+y^2
6.不太明白你意思了,(-2-3)不就是-5吗?——
(-2-3)平方=25
这个自己看公示就可以了,考试没人帮到你的。
1 =ax+2xb+ay+2by
2:=(3a)\b+10a+9\2b+15=(6a+9)\2b+10a+15
3:=(-2)x^2+2x-3x-3:=(-2)x^2-x-3
4:=-6m^2+4m-3m+2=-6m^2+m+2
5:=x^2-2xy+y^2
6:=(-5)^2=25