How can I transform this negative portion to a hopeful one? that does not matter if the molecule or denominator is an unfavorable of positive, I simply need to remove the key one. However, ns think that \$-fracx-2\$ is equal to \$frac-x-2\$, is this true?

For any kind of real number \$a\$ and \$b eq 0\$, we have actually \$-fracab=frac-ab=fraca-b\$. Also, \$-frac-ab=-fraca-b=frac-a-b=fracab\$.

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Realize that an adverse signs stand for multiplying the number through \$-1\$. Any portion can be multiplied by \$frac aa\$ without an altering the value, due to the fact that it equates to one. So, main point your portion by \$frac -1-1\$ come clear negative signs (or to move them in between the top and bottom).

ns think that \$-fracx-2\$ is equal to \$frac-x-2\$, is this true?

Yes, indeed: \$\$-fracx-2 = -1 imes fracx-2 = frac -11 imes frac x-2 = frac-x-2\$\$

But you deserve to simplify further: \$\$frac-x-2 = frac-1 imes x-1 imes 2 = frac x2\$\$ through cancelling \$-1\$ that in the numerator and also denominator.

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