## AriPotta Group Title sorry @Hero, but can you help again? one year ago one year ago

47/7 = 7. That means that √49 is 7. That makes the answer 7/√2

2. Hero Group Title

@Bladerunner1122, there's more to it than you think.

3. Hero Group Title

No, it's not that simple unfortunately

oh?

Enlighten me.

6. Kainui Group Title

Technically you're not completely wrong, but it's nicer to multiply by sqrt(2)/sqrt(2) to get the radical out of the denominator.

7. Hero Group Title

The fraction is not in simplest form. You have to rationalize like what @Kainui is suggesting.

OH! yeah. but the answer format requires it in.

9. Kainui Group Title

You can multiply by sqrt(2)/sqrt(2) since it equals 1, and you can multiply anything by 1 without changing it.

I know, but original question has the answer selection has the √2 in the denominator.

11. Hero Group Title

@AriPotta, that's not what I got when I multiplied

Oh darn it. I'm totally wrong. xD

13. Hero Group Title

$7 \times \sqrt{2} = 7\sqrt{2}$ $\sqrt{2} \times \sqrt{2} = 2$

Mhmm... I got √(2x7x7) / 2 = 7√(2) / 2

yes

16. AriPotta Group Title

mmk. thanks guys :)