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shivraj

  • 3 years ago

we have 3 root 75 minus root 243?

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  1. suzi20
    • 3 years ago
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    \[\sqrt[3]{75} - \sqrt{243} , is this the question?\]

  2. shivraj
    • 3 years ago
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    yes

  3. suzi20
    • 3 years ago
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    or \[3 \sqrt{75} - \sqrt{243}\] ? which one ?

  4. suzi20
    • 3 years ago
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    \[3\sqrt{75} - \sqrt{243} = 3\sqrt{25}\sqrt{3} - \sqrt{81}\sqrt{3} = 15\sqrt{3}-9\sqrt{3} = 6\sqrt{3}\]

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