anonymous 3 years ago How do i change this? -2

1. anonymous

$-2\div \sqrt{5} = (-2\sqrt{5})\div5$

2. anonymous

I don't understand how that is equal.

3. anonymous

multiplying numerator and denominator by $$\sqrt5$$ $$\sqrt5$$$$\sqrt5=5$$

4. anonymous

Do you have to multiple -2 too, if not, why?

5. anonymous

-2 remains as -2, from first step to last answer.....

6. anonymous

$$\huge \frac{-2\sqrt5}{\sqrt5\sqrt5}=\frac{-2\sqrt5}{5}$$

7. anonymous

Oh my bad, ty, saw it wrong.

8. anonymous

no problem...