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(1)5x+2(﹣x+3)=﹣6 (2).

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x1:x2:x3=:1:2  x1:x2:x3=2:1:  x1:x2:x3=1:2:  x1:x2:x3=:2:1  
G(S)=G1(S)X1(S)+G2(S)X2(S)+G3(S)X3(S)  G(S)=G1(S)X1(S)G2(S)X2(S)G3(S)X3(S)  G(S)=G1(S)+G2(S)+G3(S)  G(S)=G1(S)G2(S)G3(S)X3(S)  
8,6,4,1  8,6,3,2  8,8,4,1  8,6,4,2  
8,6,4,1  8,6,3,2  8,8,4,1  8,6,4,2  
I(1)>I(2)=I(3)>I(4)=I(5)  I(1)>I(2)<I(3)>I(4)=I(5)  I(1)>I(2)>I(3)<I(4)=I(5)  I(3)>I(2)<I(1)>I(4)=I(5)  
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(﹣2xy)2=﹣4x2y2  x6÷x3=x2  (x﹣y)2=x2﹣y2  2x+3x=5x2  
-5  1   -6   6  
x2·x3=x6   (x2)3=x8   x2+x3=x5   x6÷x3=x3  
8,6,4,1  8,6,3,2  8,8,4,1  8,6,4,2  

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