(2√2+3) . (√8-6) =….

(2√2 + 3).(√8 – 6)
= 2√2 . √8 + 2√2 .(-6) + 3.√8 + 3.(-6)
= 2√16 – 12√2 + 3√8 – 18
= 2.4 – 12√2 + 3√(4.2) – 18
= 8 – 12√2 + 3.2√2 – 18
= 8 – 18 – 12√2 + 6√2
= -10 – 6√2