This question may be very simple, but I get confused on things like it.
If I have a fraction like this:
$-\frac{x}{-2}$
How can I convert this negative fraction to a positive one? It does not matter if the numerator or denominator is negative of positive, I just need to get rid of the main one. However, I think that $-\frac{x}{-2}$ is equal to $\frac{-x}{-2}$, is this true?
$\endgroup$ 13 Answers
$\begingroup$For any real numbers $a$ and $b\neq 0$, we have $-\frac{a}{b}=\frac{-a}{b}=\frac{a}{-b}$. Also, $-\frac{-a}{b}=-\frac{a}{-b}=\frac{-a}{-b}=\frac{a}{b}$.
$\endgroup$ 1 $\begingroup$Realize that negative signs represent multiplying the number by $-1$. Any fraction can be multiplied by $\frac aa$ without changing the value, since it equals one. So, multiply your fraction by $\frac {-1}{-1}$ to clear negative signs (or to move them between the top and bottom).
$\endgroup$ $\begingroup$I think that $-\frac{x}{-2}$ is equal to $\frac{-x}{-2}$, is this true?
Yes, indeed: $$-\frac{x}{-2} = -1 \times \frac{x}{-2} = \frac {-1}{1}\times \frac x{-2} = \frac{-x}{-2}$$
But you can simplify further: $$\frac{-x}{-2} = \frac{-1\times x}{-1\times 2} = \frac x2$$ by cancelling $-1$ of in the numerator and denominator.
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