Question

simplify 7-3√5/7+3√5​

Answer 1

Answer:

$\frac{7-3\sqrt{5} }{7+3\sqrt{5} } = \frac{47-21\sqrt{5} }{2}$

Answer 2

$\frac{7 - 3 \sqrt{5} }{7 + 3 \sqrt{5} } \\ \\ = \frac{7 - 3 \sqrt{5} }{7 + 3 \sqrt{5} } \times \frac{7 - 3 \sqrt{5} }{7 - 3 \sqrt{5} } \\ \\ = \frac{49 + 45 - 42 \sqrt{5} }{49 - 45} \\ \\ = \frac{94 - 42 \sqrt{5} }{4} \\ \\ = \frac{47 - 21 \sqrt{5} }{2}$