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GoldRush18

  • 3 years ago

without the use of tables or a calculator, simplify

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  1. GoldRush18
    • 3 years ago
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    \[\sqrt{28 + \sqrt{343}}\] in the form ksqrt7 where k is an integer

  2. jim_thompson5910
    • 3 years ago
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    Is it supposed to be \[\sqrt{28} + \sqrt{343}\] instead?

  3. ashishthomas7
    • 3 years ago
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    \[\sqrt{7*4+\sqrt{7^{3}}}\]

  4. GoldRush18
    • 3 years ago
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    @jim_thompson5910 yes i couldnt get it like that

  5. jim_thompson5910
    • 3 years ago
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    alright thank you

  6. jim_thompson5910
    • 3 years ago
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    \[\Large \sqrt{28} + \sqrt{343}\] \[\Large \sqrt{4*7} + \sqrt{49*7}\] \[\Large \sqrt{4}*\sqrt{7} + \sqrt{49}*\sqrt{7}\] \[\Large 2*\sqrt{7} + 7*\sqrt{7}\] \[\Large (2 + 7)*\sqrt{7}\] \[\Large 9\sqrt{7}\] So the answer is \[\Large 9\sqrt{7}\]

  7. ashishthomas7
    • 3 years ago
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    \[9\sqrt{7}\]

  8. GoldRush18
    • 3 years ago
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    thank you

  9. jim_thompson5910
    • 3 years ago
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    you're welcome

  10. ashishthomas7
    • 3 years ago
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    you're welcome

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