tolong jawab 2 soal matematika saya
4.
[tex] \frac{(3 + \sqrt{2} )( - 3 + \sqrt{2} )}{(3 + \sqrt{2} ) + ( - 3 + \sqrt{2}) } = \frac{ - 9 + 3 \sqrt{2} - 3 \sqrt{2} + 2 }{3 + \sqrt{2} - 3 + \sqrt{2} } \\ = \frac{ - 7}{2 \sqrt{2} } \\ \frac{ - 7}{2 \sqrt{2} } \times \frac{2 \sqrt{2} }{2 \sqrt{2} } = \frac{ - 14 \sqrt{2} }{8} = - \frac{7 \sqrt{2} }{4} \\ [/tex]
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