Question

If 3+√8/3-√8 = a+ b√8; then, a = ?

Answer 1

step 1: Rationalization

step 2: apply formula

$(x + y).(x + y) = (x + y)^{2} \\ (x - y).(x + y) = (x^{2} - y^{2} )$

step 3: solve