sederhanakan bentuk perkalian a.(√3-2) (√3+2) b.5√6(4√2 - 3√6) c.(√2-3) (√6 - √2)

a. (√3-2)(√3+2)
= 3 - 4
= -1
b. 5√6 (4√2-3√6)
= 20√12-15√36
= 20√4.3 -15.6
= 20.2 √3 - 90
= 40√3 -90
c. (√2-3)(√6-√2)
= √12-2 -3√6+3√2
= √4.3 -2 -3√6+3√2
= 2√3 - 2 - 3√6 + 3√2