(4√3 + 2√5) (4√3-2√5)=......

(4√3 + 2√5) (4√3 - 2√5)
= (4√3)² - (2√5)²
= (16 . 3) - (4 . 5)
= 48 - 20
= 28

(4√3 + 2√5) (4√3 - 2√5)
= 16 × 3 - 4 × 5
= 48 - 20
= 28

semoga membantu :)