Question

$if {a}^{2} - 4a - 1 = 0 \: then \: the \: value \: of \: {a}^{2} - \frac{1}{{a}^{2} } + 3a - \frac{3}{a} is$
​

Answer 1

hey mate !

your question's last digit is unclear ....

Yet I've solved it by assuming it 5

Similarly put a= 2- √5 and solve again.

feel free to catch me up on facebook and twitter.