先化简,后计算!(x-1)(x-2)-3x(x+3)+2(x+2)+(x-1),其中x=1/3

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先化简,后计算!(x-1)(x-2)-3x(x+3)+2(x+2)+(x-1),其中x=1/3先化简,后计算!(x-1)(x-2)-3x(x+3)+2(x+2)+(x-1),其中x=1/3先化简,后计

先化简,后计算!(x-1)(x-2)-3x(x+3)+2(x+2)+(x-1),其中x=1/3
先化简,后计算!
(x-1)(x-2)-3x(x+3)+2(x+2)+(x-1),其中x=1/3

先化简,后计算!(x-1)(x-2)-3x(x+3)+2(x+2)+(x-1),其中x=1/3
(x-1)(x-2)-3x(x+3)+2(x+2)+[应该是乘号吧](x-1),其中x=1/3
(x-1)(x-2)-3x(x+3)+2(x+2)(x-1)
=(x-1)(x-2+2x+4)-3x(x+3)
=(x-1)(3x+2)-3x(x+3)
=3x^2-x-2-3x^2-9x
=-10x-2
=-10*(1/3)-2
=-16/3

(x-1)(x-2)-3x(x+3)+2(x+2)+(x-1)
=x²-3x+2-3x²-9x+2x+4+x-1
=-2x²-9x+5
=-2×1/9-9×1/3+5
=16/9

(x-1)(x-2)-3x(x+3)+2(x+2)+(x-1),
=x^2-3x+2-3x^2-9x+2x+4+x-1
=x^2-3x^2-3x-9x+2x+x+2+4-1
=-2x^2-9x+5
=5-2x^2-9x
=5-2(1/3)^2-9*1/3
=5-2/9-1/3
=(45-2-3)/9
=40/9