Question

(9-4√5)^2+(9+4√5)^2​

Answer 1

hey mate here is your answer

if any doubt ask

Answer 2

$(9)^{2} + (4 \sqrt{5} ) ^{2} - 2(9)(4 \sqrt{5)} \\ \\ 81 + 80 - 76 \sqrt{5} \\ \\ 161 - 76 \sqrt{5}$

plz mark it a brainliest