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radical issue - not correct between quotes An example for...

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I think either I am confused or perhaps there is an issue with the example. √27 + √54 This cannot be added right away, it is necessary to first simplify both radicals: √27 = 3√3 This part is correct √27 = 3√3 or √27 = √3(9) correct √54 = 6√3 This part has an issue √54 = √6(9) or 3√6 ==> that is only 3√6 3√3 + 6√3 = 9√3 “So this part would be 3√3 +3√6 and cannot be added this way”.
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Unformatted text preview: not correct between quotes An example for the class: √63 + √117 I think this too may have a similar issue √63 = √(9)7 or 3√7 correct √117 = √(9)13 or 3√13 These too are not like terms and cannot be added this way. correct Am I confused? you are not confused so the answer for this one should be 3√7 + 3√13 =3(√7+√13 ) price 1$...
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