Question

Is a^2-4a-1=0 find the value of a+1/a

Answer 1

Answer:

a^2-4a-1=0

=>a(a-4)=1

=>a=1/a-4

Hence,a+1/a

=>(1/a-4+1)/a

=>(1+a-4/1)/a

=>(-3+a/1)/a

=>-3+a/a

=>-3/a+1