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AriPotta

  • 2 years ago

sorry @Hero, but can you help again?

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

  2. Hero
    • 2 years ago
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    @Bladerunner1122, there's more to it than you think.

  3. Hero
    • 2 years ago
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    No, it's not that simple unfortunately

  4. Bladerunner1122
    • 2 years ago
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    oh?

  5. Bladerunner1122
    • 2 years ago
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    Enlighten me.

  6. Kainui
    • 2 years ago
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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.

  7. Hero
    • 2 years ago
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    The fraction is not in simplest form. You have to rationalize like what @Kainui is suggesting.

  8. Bladerunner1122
    • 2 years ago
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    OH! yeah. but the answer format requires it in.

  9. Kainui
    • 2 years ago
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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.

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

  11. Hero
    • 2 years ago
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    @AriPotta, that's not what I got when I multiplied

  12. Bladerunner1122
    • 2 years ago
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    Oh darn it. I'm totally wrong. xD

  13. Hero
    • 2 years ago
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    \[7 \times \sqrt{2} = 7\sqrt{2}\] \[\sqrt{2} \times \sqrt{2} = 2\]

  14. Bladerunner1122
    • 2 years ago
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    Mhmm... I got √(2x7x7) / 2 = 7√(2) / 2

  15. Bladerunner1122
    • 2 years ago
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    yes

  16. AriPotta
    • 2 years ago
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    mmk. thanks guys :)

  17. Bladerunner1122
    • 2 years ago
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    Sorry for the confusion. xD

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