AriPotta
sorry @Hero, but can you help again?



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Bladerunner1122
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47/7 = 7. That means that √49 is 7. That makes the answer 7/√2

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

Hero
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No, it's not that simple unfortunately

Bladerunner1122
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oh?

Bladerunner1122
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Enlighten me.

Kainui
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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.

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

Bladerunner1122
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OH! yeah. but the answer format requires it in.

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

Bladerunner1122
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I know, but original question has the answer selection has the √2 in the denominator.

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

Bladerunner1122
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Oh darn it. I'm totally wrong. xD

Hero
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\[7 \times \sqrt{2} = 7\sqrt{2}\]
\[\sqrt{2} \times \sqrt{2} = 2\]

Bladerunner1122
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Mhmm... I got √(2x7x7) / 2 = 7√(2) / 2

Bladerunner1122
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yes

AriPotta
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mmk. thanks guys :)

Bladerunner1122
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Sorry for the confusion. xD