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Mathematics 7 Online
OpenStudy (anonymous):

I just want to make sure this equation is right.

OpenStudy (anonymous):

\[-\sqrt{x}=-1\]

OpenStudy (anonymous):

I have to solve for x. And i got 0 but, when i plug it in I dont get -1.

OpenStudy (jdoe0001):

\(\bf -\sqrt{x}=-1\implies -1\cdot \sqrt{x}=-1\implies \sqrt{x}=\cfrac{\cancel{ -1 }}{\cancel{ -1 }}\implies \sqrt{x}=1 \\ \quad \\ (\sqrt{x})^2=(1)^2\implies \sqrt{x^2}=1^2\implies ?\)

jimthompson5910 (jim_thompson5910):

First divide both sides by -1 to get \[\Large -\sqrt{x}=-1\] \[\Large \frac{-\sqrt{x}}{-1}=\frac{-1}{-1}\] \[\Large \sqrt{x} = 1\]

jimthompson5910 (jim_thompson5910):

What's next?

OpenStudy (anonymous):

\[(\sqrt{x})^2 \]and the square root and the ^2 cancel eachother making it X=1

OpenStudy (anonymous):

I see what i did wrong. I didnt divide it.

jimthompson5910 (jim_thompson5910):

very good, you nailed it

OpenStudy (anonymous):

Thank you @jim_thompson5910

jimthompson5910 (jim_thompson5910):

you're welcome

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