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If |x+1|+|x^(2)-3x+2|=|x^(2)-4x+1|, then...

If `|x+1|+|x^(2)-3x+2|=|x^(2)-4x+1|`, then sum of the natural number solutions of equation is

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If `|x +1|+|x^(2)-3x+2|=` …………..
`|x+1|+|x^(2)-3x+2|=|x^(2)-4x+1|`
`implies |a|+|b|=|a-b|`
`implies (x+1)(x-1)(x-2)le 0`
`implies x epsilon (-oo, -1)uu[1,2]`
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