作业帮2=X^2+(2/3+1/3X)^2 (2/3+X)^2+9X^2=2
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2=X^2+(2/3+1/3X)^2 (2/3+X)^2+9X^2=2
2=X^2+(2/3+1/3X)^2 (2/3+X)^2+9X^2=2
2=X^2+(2/3+1/3X)^2 (2/3+X)^2+9X^2=2
2=X^2+(2/3+1/3X)^2 2=X^2+4/9+4/9X+1/9X^2 5X^2+2X-7=0 (5X+7)(X-1)=0 X=-7/5,X=1 (2/3+X)^2+9X^2=2 4/9+4/9X+X^2+9X^2=2 45X^2+2X-7=0 X=(-1±2√79)/45
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填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
(X+1)X(X+2)X(X+3)=504
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