Question

16+8√5-4-4√5
----------------------------- (supra)
56+24√5-24-8√5+16

Answer 1

$\frac{16+8 \sqrt{5} -4-4 \sqrt{5}}{56+24 \sqrt{5} -24-8 \sqrt{5} +16}= \frac{12+4 \sqrt{5} }{48+16 \sqrt{5}}= \frac{12+4 \sqrt{5}}{4(12+4 \sqrt{5} )}= \frac{1}{4}$