Question

A=-5/6*2²+(√5+2)(√5-2)+1/3

Answer 1

A=-5/6*2²+(√5+2)(√5-2)+1/3
a=-5/6*4+5-4+1/3
a=-20/6 + 1 + 1/3
a=-10/3 + 3/3 + 1/3
a=-10/3 + 4/3
a=-6/3
a=-2