[9x(-4)x(-2.
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[9x(-4)x(-2.
[9x(-4)x(-2.
[9x(-4)x(-2.
[9x(-4)x(-2.5)]
=9×10
=90
88
[9x(-4)x(-2.
1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/(x^2-5x+6)+(x^2-3x+8)/(x^2-4x+3)2.{(x^2)/(x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{(x^2/x^2+y^2)^2}
2.X-5分之X-4加X-9分之X-8=X-8分之X-7加X-6分之X-5,求X
求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X
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x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
如下9*9宫图如何填x x x 1 x x x 2 9x x 5 x x x x x 4x 6 8 x x x x x xx x x 7 x x 5 x xx 2 x x 6 x x 8 xx x 3 x x 9 x x xx x x x 5 x 1 6 x 4 x x x 3 x x x x 7 x x x x 2 x x x
因式分解4x平方-25,x三次方-4x,x平方y-9y,x平方-x-2.
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x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
4x+9x=13x
9x-x+4x=( )
x*9+x*36+4x*12
1.(x+1)(x-1)-(x+2)(x-3)=9 x多少 2.(3x+4)(3x-4)<1.(x+1)(x-1)-(x+2)(x-3)=9 x多少 2.(3x+4)(3x-4)<9(x-2)(x+3) x多少
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解决数独问题x 1 x 7 x x x 3 xx x x x 4 x 2 x x9 x 3 6 x 8 7 x 58 x x x x 9 x x xx x 2 x 5 x x x 4x 3 x x x x 6 x xx x x x x x x x 26 x x x x x x x 7x 5 4 1 7 x 9 8 x这道题我用了很多办法都没有头绪,请帮忙的朋友把解题的思