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26-03-2019
Mathematics

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Help on this cause I can’t understand it

Help on this cause I cant understand it class=

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WardahD WardahD

26-03-2019

[tex](3 + \sqrt{2} )(3 - \sqrt{2} ) \\ {(3)}^{2} - { (\sqrt{2}) }^{2} \\ = 9 - 2 \\ = 7[/tex]

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