Question

if a^2 -4a+1=0 then a^2+ 1/a^2=?

Answer 1

I do not knowwwwwwwwww

Answer 2

let solve it by formula method

a=1 b=-4 c=-1

so find value of b^2—4ac

then

a=((-b) plus minus (√b^2—4ac))/2a

then u will get two values of a or then put that values in a^2+1/a^2 u will get your answer