化简1.9x-9/4-4x 2.x^2-1/x^2+x-2 3.x^2-4x+4/2x-4 4.3x^2-9x-12/x^2+2x+1 5.x^2-7x+12/-x^2+9x-20 急6.xy-x-y+1/y^2-2y+1
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化简1.9x-9/4-4x2.x^2-1/x^2+x-23.x^2-4x+4/2x-44.3x^2-9x-12/x^2+2x+15.x^2-7x+12/-x^2+9x-20急6.xy-x-y+1/y^
化简1.9x-9/4-4x 2.x^2-1/x^2+x-2 3.x^2-4x+4/2x-4 4.3x^2-9x-12/x^2+2x+1 5.x^2-7x+12/-x^2+9x-20 急6.xy-x-y+1/y^2-2y+1
化简1.9x-9/4-4x 2.x^2-1/x^2+x-2 3.x^2-4x+4/2x-4 4.3x^2-9x-12/x^2+2x+1 5.x^2-7x+12/-x^2+9x-20 急
6.xy-x-y+1/y^2-2y+1
化简1.9x-9/4-4x 2.x^2-1/x^2+x-2 3.x^2-4x+4/2x-4 4.3x^2-9x-12/x^2+2x+1 5.x^2-7x+12/-x^2+9x-20 急6.xy-x-y+1/y^2-2y+1
1.9x-9/4-4x
=9(x-1)/4(1-x)
=-9/4
2.x^2-1/x^2+x-2
=(x+1)(x-1)/(x-1)(x+2)
=(x+1)/(x+2)
3.x^2-4x+4/2x-4
=(x-2)²/2(x-2)
=(x-2)/2
4.3x^2-9x-12/x^2+2x+1
=3(x-4)(x+1)/(x+1)²
=3(x-4)/(x+1)
5.x^2-7x+12/-x^2+9x-20
=(x-3)(x-4)/-(x-4)(x-5)
=-(x-3)/(x-5)
6.xy-x-y+1/y^2-2y+1
=(y-1)(x-1)/(y-1)²
=(x-1)/(y-1)
报名
化简1.9x-9/4-4x 2.x^2-1/x^2+x-2 3.x^2-4x+4/2x-4 4.3x^2-9x-12/x^2+2x+1 5.x^2-7x+12/-x^2+9x-20 急6.xy-x-y+1/y^2-2y+1
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*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
难倒爱因斯坦的九宫格X 7 X | X 8 1 | X X X |X X X | X 4 X | 7 5 9 |X X 5 | 7 X 9 | X 1 4 |5 X X | X X 8 | 3 9 X |3 9 6 | 4 X 7 | X X 2 |X 8 7 | 9 X X | X X X |4 X X | 6 X 5 | X X X | X X 4 | X X 1 |2 X X | X X X | X X X | X 3 X | X X X |X 6
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