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k

Help with Q12! :)

can you try now the next step?

\[P=\frac{ (9+4\sqrt{5})^{n}(2+\sqrt{5}) }{ -1 }\]
P=\[P=(\sqrt{5}-2)(9+4\sqrt{5})^{n}\]

you can continue the next step

thats ok :D

check on this one
\[\sqrt{(4)^{2}}\sqrt{5}=\sqrt{16*5}=\sqrt{80}\]

OH OH okay thank you so much! I got it now!!

YW good luck now ... :D