Can someone please explain me why it was switched from - to +

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asked Mar 4, 2019 144k views

1 Answer

Rrcal · Answer 1 · 2019-03-08T16:53:10+0000

that's because the denominator is negative and when you simplify it then the denominator gets cancelled and becomes -1 therefore the sign moves to the numerator and it becomes negative

Can someone please explain me why it was switched from - to +

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