(4 × akar3 - 3 akar2) (4 × akar3 + 3 akar 2)

hasilnya 12

semoga membantu...

(4√3 -3√2) (4√3 +3√2)
= 4√3 × 4√3 + 4√3 × 3√2 - 4√3 × 3√2 - 3√2 × 3√2
= 48 +12√6 -12√6 -18
= 48 - 18
= 30