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If =|-x a bb-x a a b-x| , then a factor ...

If `=|-x a bb-x a a b-x|` , then a factor `` is `a+b+x` `x^2-(a-b)+x+a^2+b^2+a b` `x^2-(a+b)+x+a^2+b^2-a b` `a+b-x`

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