Question

if a=b+2 root 3,find a-1/a

Answer 1

Plz find this answer

Answer 2

=2+√3 ∴, 1/a=1/(2+√3)=(2-√3)/(2+√3)(2-√3)=(2-√3)/(4-3)= 2-√3 ∴, a+1/a=2+√3+2-√3=4 now, a²=(2+√3)²=4+4√3+3=7+4√3