Jawaban:
[tex] \frac{18}{4 - \sqrt{7} } = \frac{18}{4 - \sqrt{7} } \times \frac{4 + \sqrt{7} }{4 + \sqrt{7} } = \frac{(18)(4 + \sqrt{7}) }{16 + 4 \sqrt{7} - 4 \sqrt{7} - 7 } = \frac{(18)(4 + \sqrt{7}) }{16 - 7} = \frac{(18)(4 + \sqrt{7}) }{9} [/tex]
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Jawaban:
[tex] \frac{18}{4 - \sqrt{7} } = \frac{18}{4 - \sqrt{7} } \times \frac{4 + \sqrt{7} }{4 + \sqrt{7} } = \frac{(18)(4 + \sqrt{7}) }{16 + 4 \sqrt{7} - 4 \sqrt{7} - 7 } = \frac{(18)(4 + \sqrt{7}) }{16 - 7} = \frac{(18)(4 + \sqrt{7}) }{9} [/tex]